Lab 33 Configuring HSRP Tracking and Asymetrical Routing Part II

After completing the physical installation and the Frame Relay switch configuration, you should establish IP connectivity among all the routers. Example 16-7 lists the Frame Relay configuration used in this lab. Example 16-7 Frame Relay Switch Configuration < < < text omitted> > > frame-relay route 131 interface Serial1 31 frame-relay route 121 interface Serial3 21 interface Serial1 no ip address encapsulation frame-relay clockrate 148000 frame-relay intf-type dce frame-relay route...

CM BWmin DELAYsum

To demonstrate composite metric calculation, refer to Figure 11-1. In this example, EIGRP calculates a composite metric on the alpha router to 172.16.1.0 24, which resides on the charlie router. Assuming that the bandwidth statements been set by an astute engineer, the lowest bandwidth on the path between alpha and charlie routers would be 56. Therefore, you have The delay is the summation of the delays on the outbound interfaces only. The summation ends with the delay on the interface in which...

Lab 13 Configuring Frame Relay Networks and Controlling Frame Relay ARPPart II

Attach the four routers in a back-to-back manner to the Frame Relay network cloud. Use V.35 cables or CSU DSUs with crossover cables to connect the routers to the Frame Relay switch. Create the four LANs by the use of switches or hubs MAUs. When the physical connections are complete, assign IP addresses to all LAN interfaces, as depicted in Figure 5-7. Be sure that you can ping the router's local LAN interface before moving on. Begin with the sv_lair router, where you can use subinterfaces....

Lab 22 Eigrp Route Redistribution Summarization and Stub Routing Part I

As EIGRP networks continue to grow in popularity, it becomes increasingly important to be able to control the query range and integrate it with other routing protocols, such as RIP and OSPF. It is also important to understand the default setting of EIGRP, such as split horizon and autosummarization. This lab gives you practice in controlling the query range, integrating EIGRP with other routing protocols, and performing summarization. Cisco Training Partners provide custom-tailored Cisco...

Example 122 Complex OSPF Route Table

Codes C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, * - candidate default U - per-user static route, o - ODR Gateway of last resort is 172.16.128.1 to network 0.0.0.0 10.0.0.0 24 is subnetted, 1 subnets O 10.10.10.0 is a summary, 03 05 49,...

VTP and Trunking Protocols

A powerful function of VLANs is their capability to span distance. VLANs are communicated from switch to switch by the means of a VLAN Trunking Protocol (VTP). VTP is used to maintain global VLAN information between switches. A VLAN management domain, or VTP domain, consists of one or more switches interconnected and sharing the same administrative responsibility. Anytime that you want the VLANS on one switch to have information about the VLANs on another switch (that is, when you want these...

Lab 20 Integrating RIP Networks Redistribution Route Filtering and Control Part II

Attach the four routers in a back-to-back manner to the Frame Relay switch. Use V.35 cables or CSU DSUs with crossover cables to connect the routers to the Frame Relay switch. Create the four LANs by the use of switches or hubs MAUs. When the physical connections are complete, assign IP addresses to all LAN interfaces, as depicted in Figure 9-7. Be sure that you can ping the router's local LAN interface before moving on. First, we will focus on configuring the routers in the RIP domain. Start...

Example 121 debug ip ospf adj Command Followed by a show ip ospf neighbor Command Demonstrating an Adjacency Forming

OSPF adjacency events debugging is on Build router LSA for area 0, router ID 172.16.1.1 Build router LSA for area 0, router ID 172.16.1.1 Build router LSA for area 0, router ID 172.16.1.1 SYS-5-CONFIG I Configured from console by console OSPF 2 Way Communication to 172.16.1.10 on EthernetO, state 2WAY two-way state Build router LSA for area 0, router ID 172.16.1.1 2 Way Communication to 172.16.1.5 on EthernetO, state 2WAY Backup seen Event before WAIT timer on EthernetO DR BDR election on...

Example 218 Configuration of VLAN 175

Switch vlan database Switch(vlan) vlan 175 name backbone Name backbone Switch(vlan) apply APPLY completed. Switch(vlan) Other options might be configured on the VLAN from this mode. They include the following Switch(vlan) vlan vlan num name vlan name state active suspend said mtu mtu bridge bridge number stp type ieee ibm auto name Allows you to attach a 32-character name to the VLAN. state Allows you to suspend the VLAN. A suspended VLAN is propagated through VTP, but no user traffic will be...

N

Your telephone is connected to the phone company by a local loop, sometimes referred to as the last mile. The local loop contains an electrical communication path of two wires, one for transmitting and one for receiving voice signals (see Figure 6-7). The two-wire circuit is referred to as tip and ring. The ring is tied to the negative side of the battery at the phone company, and the tip is tied to the ground. Again, when you lift the handset off the cradle and go off-hook, the current flows...

Default Routing with EIGRP

A default route can be injected into EIGRP in two primary ways Redistribute a default static route into EIGRP so that EIGRP recognizes the route of 0.0.0.0 to be the default route. A default static route is created with the global router entry ip route 0.0.0.0 0.0.0.0 next_hop_IP_address. This route then must be redistributed into EiGrp with the redistribute static command. If the network 0.0.0.0 is not used, you can still mark the route as a default route by using the ip default-network...

Show ip ospf neighbors Command

This can be one of the most useful commands when verifying the operational status of OSPF. The show ip ospf neighbor command shows the status of all OSPF neighbors. The command also shows whether the neighboring router is a DR, a BDR, or a DROTHER. For a neighbor to form, the HelloInterval, RouterDeadInterval, area IDs, and authentication type and password must match. Neighbors should form automatically on broadcast type networks such as Ethernet, Tokin Ring, and FDDI. Additional configuration...

Simulating Wide Area Network Connections

Interfaces V35 232 X21 Hssi

The other major part of modeling the internetwork consists of WAN connections. At this point in the design, you are concerned only with ISO Layer 1. You will continue to model the internetwork from Layer 1 on up because this is the most logical way to build any network. First, you will build all the physical connections to all your devices, and then you will configure all LAN interfaces, WAN interfaces, and finally your different networks together with routing protocols. Constructing a network...

Introduction to Analog Telephony

This section describes the telephone network with a focus on analog technology and includes the following topics Trunk line seizure signaling types Basic telephone call components consist of a telephone, a local loop, a voice switch (CO PBX), and trunks, as shown in Figure 6-1. Everyone is familiar with the telephone, but there are components within the telephone set that you might not be familiar with. The handset is the part of the phone that you hold in your hand to speak (transmit) and...

Technical Overview of EIGRP

EIGRP offers many advantages over other routing protocols, including the following Support for VLSM EIGRP is a classless routing protocol and carries the subnet mask of the route in its update. Rapid convergence By using the concept of feasible successors, defined by DUAL, EIGRP is capable of preselecting the next best path to a destination. This allows for very fast convergence upon a link failure. Low CPU utilization Under normal operation, only hellos and partial updates are sent across a...

Example 230 Viewing Spanning Tree for VLAN

Switch (enable) show spantree summary Summary of connected spanning tree ports by vlan Uplinkfast disabled for bridge. Backbonefast disabled for bridge. Vlan Blocking Listening Learning Forwarding STP Active Blocking Listening Learning Forwarding STP Active To properly set the STP root, it helps to recall the four-step decision process that STP follows when determining root and which ports will forward and which ones will block. The four-step decision process is based on the following 1. Lowest...

Split Horizon

Recall from earlier that split horizon is a routing technique in which information about routes is prevented from exiting the router interface or subinterface through which that information was received. Split horizon is most prevalent in multipoint networks. Here, routing updates flow into one subinterface but also must be sent out that very same subinterface to reach the other routers on the multipoint network. Split horizon is enabled by default and prevents specific route updates for EIGRP,...

Lab 22 Eigrp Route Redistribution Summarization and Stub Routing Part II

Configure the Frame Relay switch and attach the four routers in a back-to-back manner to the Frame Relay switch. Use V.35 cables or CSU DSUs with crossover cables, to connect the routers. Create the four LANs by using switches or hubs MAUs, as illustrated in Figure 11-13. When the physical connections are complete, assign IP addresses to all LAN and WAN interfaces, as depicted in Figure 11-13. Be sure that you can ping each router's local LAN and WAN interface before moving on. The wisconsin...

Table A3 ISDN Cause Values

The ISDN number was sent to the switch in the correct format however, the number is not assigned to any destination equipment. No route to specified transit network The ISDN exchange is asked to route the call through an unrecognized intermediate network. The call was routed through an intermediate network that does not serve the destination address. The service quality of the specified channel is insufficient to accept the connection. Call awarded and being delivered in an established channel...

Shortest Path Tree SPF and the OSPF Metric Cost

When the LS database is synchronized within an area, the Dijkstra algorithm is run against it in two passes to form the shortest-path (SPF) tree. The first pass against the SPF database forms the branches, or router adjacencies within the area. The second pass adds all leaves or stub networks to the tree. When OSPF builds the tree, it determines the shortest path to each destination based on the sum cost to the destination. The lower the cost is, the more preferred the route is. The cost of a...

Figure 161 HSRP in a Typical Network

In Figure 16-1, all the TCP IP clients have a default gateway set to 172.16.1.1. The default gateway tells the IP client to forward any traffic not found on a local subnet to a specific IP address. The 172.16.1.1 address then is used as the HSRP virtual address. In this example, the router caladan is configured to track the serial interface to arakas. This means that if the serial interface enters a down state, it decrements the router's priority by 10 or by another configured value. While the...

WAN Protocols and Technologies High Level Data Link Control HDLC

Wide-area networks evolved from the need to share data across vast geographical distances. The definition of WAN is a network spanning a wide geographic area. The purpose of the WAN is to connect local-area networks (LANs) and to transport data from one LAN to another. In our studies, the WAN is used much in the same way. WAN protocols have changed over time. At first, WAN protocols focused on error correction and were designed to operate on old, unreliable copper lines. WAN protocols today...

Example 1511 debug ip nat detailed Output from the easyip Router

00 24 07 NAT i udp (172.16.1.10, 137) -> (206.191.193.1, 53) 25601 00 24 07 NAT ipnat_allocate_port wanted 137 got 137 s 172.16.1.10-> 206.191.194.42, d 206.191.193.1 25601 o udp (206.191.193.1, 53) -> (206.191.194.42, 137) 44225 s 206.191.193.1, d 206.191.194.42-> 172.16.1.10 44225 i udp (172.16.1.10, 1046) -> (206.191.193.1, 53) 25857 ipnat_allocate_port wanted 1046 got 1046 s 172.16.1.10-> 206.191.194.42, d 206.191.193.1 25857 o udp (206.191.193.1, 53) -> (206.191.194.42, 1046)...

Configuring Spanning Tree Explorers

By default, Cisco routers use all-routes explorer frames to generate the RIF. In large redundant networks, the number of explorers can multiply exponentially as they are duplicated and forwarded throughout the network. Recall from the previous section that Spanning Tree explorers reduce the number of explorers on the network. Spanning Tree nodes will forward Spanning Tree explorers only to nodes that are configured for Spanning Tree. To enable the spanning tree explorers, use the following...

NTP Overview

NTP was designed to provide an accurate and stable clock to remote sources across an unmanaged, global Internet environment. Before NTP, other protocols such as Daytime protocol, Time protocol, and ICMP timestamp provided this service. Digital Time Service (DTS) accomplished many of the same objectives as NTP. However, NTP provides for the use of stratum information in clock selection and provides an accurate compensation for inherent clock frequency errors. DTS does not use a stratum or...

Lab 14 Configuring Frame Relay Networks Traffic Shaping Ospf DlswLLC2Part II

Attach the three routers in a back-to-back manner to the frame switch. Use V.35 cables or CSU DSUs with crossover cables to connect the routers to the frame switch. Create the three LANs by the use of switches or hubs MAUs. This lab requires you to configure IP and OSPF. The order in which you will configure the network will be first the LANs for IP, second the WAN for IP, and finally OSPF. When the physical connections are complete, assign IP addresses to all LAN interfaces, as depicted in...

Example 120 Displaying the Entire Frame Relay Configuration

Interface EthernetO ip address 172.16.1.2 255.255.255.0 interface SerialO no ip address encapsulation frame-relay clockrate 56000 frame-relay lmi-type ansi frame-relay intf-type dce frame-relay route 101 interface Serial5 102 < < < text omitted> > > interface Serial5 no ip address encapsulation frame-relay clockrate 56000 frame-relay intf-type dce frame-relay route 102 interface Serial0 101 < < < text omitted> > > line con 0 line aux 0 line vty 0 4 login At this point,...

Static PVC Implementation

Example 8-1 presents the configurations for Routers A, B, and C. Notice that the subinterfaces are used to interconnect routers over the ATM cloud. You can use major interfaces instead. Use of the subinterfaces, however, positions you with a more scalable configuration. Also, the example illustrates the use of LLC SNAP encapsulation (as opposed to mux). LLC SNAP encapsulation positions your VCs to carry multiple protocols, whereas mux encapsulation carries only one protocol. I can think of only...

Example 732 show dialer Command Reveals the Reason for an ISDN Call

Remote Site show dialer BRI0 - dialer type ISDN Dial String Successes Failures Last called 0 incoming call(s) have been screened. 0 incoming call(s) rejected for callback. Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs), Re-enable (15 secs) Dialer state is data link layer up Dial reason ip (s 175.10.23.1, d 224.0.0.5) Time until disconnect 49 secs Connected to 6129319833 (Headquarters) Idle timer (120 secs), Fast idle timer (20 secs) Wait for carrier (30 secs),...

Building the Framework for Internetwork Modeling Configuring Key Components

Every model that you construct in this book starts from a similar framework. Most models involve one or more LANs and WANs of course, routers and hubs are needed for this. You also need a device for local or remote access to the model, along with a test application to run or test the model. Thus, your framework for most models consist of routers, hubs, a Frame Relay switch, an access server, and a couple of workstations. From this framework, you build and design many models, making only subtle...

Example 1328 show dlsw peer Command Output

Peers state pkts_rx pkts_tx type drops ckts TCP uptime TCP 172.16.128.9 CONNECT 1863 847 conf 0 1 0 04 19 26 Total number of connected peers 1 Total number of connections 1 The possible states that a peer can be in are as follows Connect The DLSw peer is up and has a transport active to the peer. This is the normal state that a peer should be in. DISCONNECT The local peer does not have a valid or active transport to the remote peer. CAP_EXG The local peer is in the capabilities exchange mode...

Debug serial interface Command

Remember that, before you turn on debugs on you should always have the logging buffered 10000 statement present in your configuration. This prevents a flood of console messages form tying up the console. To demonstrate the usefulness of these commands, we inserted faults into the previously mentioned lab. We will focus on troubleshooting one side of the problem at a time. Starting with the espn router, perform the show interface serial 5 command. Example 3-7 lists the output of the show...

How Do I Become a CCIE

The first step with any serious undertaking is to take a hard, honest assessment of your current skills. Know your strengths and acknowledge your weaknesses. Cisco has specifically designed the CCIE practical exam to weed out candidates with little hands-on or field experience. When you take your personal assessment, be very honest with past experience. This will help you identify the areas that you need to focus on. For instance, many people (unless they have worked with SNA) have little field...

Example 422 debug Output from a Successful Dial Connection

Skynet_lab debug ppp negotiation skynet_lab debug ppp authentication skynet_lab debug ppp error -UPDOWN Interface Async8, changed state to MagicNumber 0x00F1EF7A (0x050600F1EF7A) MagicNumber 0xE7427D86 (0x0506E7427D86) MagicNumber 0x00F1EF7A (0x050600F1EF7A) MagicNumber 0x00F1EF7A (0x050600F1EF7A) MagicNumber 0xE7427D86 (0x0506E7427D86) MagicNumber 0xE7427D86 (0x0506E7427D86) Phase is AUTHENTICATING, by this end ' PAP begins I AUTH-REQ id 1 len 16 from JP O CONFREQ Closed id 9 len 10 * IPCP...

EIGRP Manual Summarization or Route Aggregation

EIGRP manual summarization is critical to large EIGRP networks. It limits the EIGRP query and can significantly reduce the size of the routing table. There are essentially two ways to deploy manual summarization Advertise an summary address or aggregate address with the following interface command ip summary-address eigrp as_number summary_address address_mask Advertise a default route with the following interface command ip summary-address eigrp as_number 0.0.0.0 0.0.0.0. This command causes...

The Access Server

You use the access server as the primary configuration device. From this device, you configure the other routers and switches through a reverse Telnet session. The Cisco routers that accomplish this function the most efficiently are the Cisco routers with the SCSI-II 68-pin async port and the eight-to-one octopus cable. The most common routers that provide this port are the following Cisco 2600 3600 with SCSI-II 68-pin 16 32-port async port Any Cisco router might be configured for asynchronous...

Example 414 Output of a Successful debug ppp negotiation

01 01 57 Asyncl Dialing cause ip (s 172.16.128.2, d 172.16.1.1) started, Dialer-list is OK Async1 Attempting to dial 5496561 CHAT1 Attempting async line dialer script CHAT1 Dialing using Modem script dialhost & System script none TTY1 cleanup pending. Delaying DTR Async Protocol Mode started for 172.16.128.1 AAA ACCT Using PPP accounting list -UPDOWN Interface Async1, changed state to up Phase is ESTABLISHING, Active Open * PPP MagicNumber 0x0069B38A (0x05060069B38A) MagicNumber 0x0069B38A...

The New One Day CCIE Lab Exam

I was fortunate enough to talk to Lorne Braddock Sr., the manager of the CCIE program, about the move from a two-day test to a one-day test. Like many CCIEs, I had a knee-jerk reaction to the move. I was aware of the huge backload that Cisco was experiencing with people waiting to get into the lab in some cases, the waiting list was approaching a year long. Many Cisco partners required people to get certified to retain or gain a preferred partner status. For many Cisco partners, the revenue...

Table A1 Supported ISDN Switch Types

NET3 ISDN and Euro-ISDN switches (UK and others), also called E-DSS1 or DSS1 Japanese NTT ISDN switches (ISDN BRI only) AT& T 4ESS switch type for the United States (ISDN PRI only) AT& T 5ESS switch type for the United States (ISDN PRI only) NT DMS-100 switch type for the United States (ISDN PRI only) INS-Net 1500 for Japan (ISDN PRI only) Australian TS014 switches (ISDN PRI only) French VN2 ISDN switches (ISDN BRI only) French VN3 ISDN switches (ISDN BRI only) French VN4 ISDN switches...

Contributing Authors

Dan Keller, CCIE 6489, currently works at Qwest Communications as a senior network architect focusing on WAN design. Dan lives in Huntington Beach, California. Dan contributed Chapter 7, WAN Protocols and Technologies Integrated Services Digital Network (ISDN) Galina Diker Pildush, CCIE 3176, CCSI, is the president and a senior consultant at Advanced Communications Experts (ACE), Inc. She provides training and course development for Global Knowledge Network, Inc., the largest Cisco Learning...

Figure 236 SNMP Configuration Panel

Scjic) fhilhcnt i cal i on Traps Ves Switch operation can be verified from the main configuration menu. Under the main configuration menu, the Statistics option offers a vast array of statistics to view. The most useful statistics are port statistics and VLAN statistics. The best way to become familiar with the commands that are put into menus such as this is not to spend time reading about them in a book, but to simply spend time selecting and viewing the different options on the switch....

Example 216 Configuring Physical Port Properties

Enter configuration commands, one per line. End with CNTL Z. 04 59 58 SYS-5-CONFIG_I Configured from console by console Switch(config) interface fastEthernet 0 6 Switch(config-if) speed 10 Switch(config-if) duplex full Switch(config-if) description Internet_port Switch(config-if) exit Some of the common physical properties of Ethernet that can be changed are as follows duplex full half auto Sets the port duplex mode. speed 10 100 auto Sets the port speed. mtu 1500bytes-2018bytes Configures the...

Commands to Influence OSPF Routing Decisions

You can control routing updates within OSPF in multiple ways. Recall that OSPF calculates a cost to a destination based on a formula involving bandwidth. To influence route decisions, you can either change the bandwidth on the interface, which in turn will affect the cost of the link, or directly change the cost of the interface. OSPF also supports the direct changing of the administrative distance with the distance command, much like EIGRP. OSPF also uses the passive interface command to...

Example 1342 The DLSw Capabilities of the solo Router

DLSw Capabilities for peer 172.16.128.5(2065) vendor id (OUI) '00C' (cisco) configured ip address peer type version string Cisco Internetwork Operating System Software IOS (tm) 2500 Software (C2 500-JS-L), Version 12.1(2)T, Copyright (c) 1986-2000 by cisco Systems, Inc. Compiled Tue 16-May-00 15 28 by ccai You also can use the dlsw reachability command to help you test DLSw networks. By configuring a router with a dlsw icanreach dummyname, you can easily tell whether your DLSw configuration is...

ISDN Encapsulation Options

ISDN routers can support both PPP and HDLC encapsulations. HDLC is the default encapsulation, but the vast majority of ISDN routers use PPP. The main reason that PPP is chosen over HDLC is because HDLC cannot use both B channels simultaneously. With HDLC, both B channels can be up, but one channel is used to send and the other is used to receive traffic. Each B channel has the capability to provide full duplex (send and receive at the same time), so by using HDLC, you are essentially cutting...

Example 129 Configuration of john and mark Using Network Types

Interface Serial0 no ip address no ip directed-broadcast encapsulation frame-relay no ip mroute-cache interface Serial0.1 multipoint ip address 172.16.1.5 255.255.255.0 no ip directed-broadcast ip ospf network point-to-multipoint Change the default OSPF network type Priority is not needed, no DR BDR on PTM frame-relay map ip 172.16.1.6 121 broadcast frame-relay map ip 172.16.1.1 111 broadcast router ospf 7 router-id 192.168.250.250 network 172.16.1.0 0.0.0.255 area 10 network 172.16.2.4 0.0.0.3...

Example 111 The Command Used on a Router That Supports Confreg

*** System received an abort due to Break Key *** signal 0x3, code 0x0, context 0x6033f2b8 PC 0x6005eba4, Cause 0x20, Status Reg 0x34408302 alias set and display aliases command boot boot up an external process break set show clear the breakpoint confreg cont context cookie dev dir dis dnld frame help history meminfo repeat reset set stack sync sysret unalias At times, reading the English wording of CONFREG can actually be harder to understand than just manipulating the bits in the register. To...

Figure 139 IEEE 8025 MAC Frame Format

The RIF is inserted into the MAC header immediately following the source address field in every frame by the source station. The destination station reverses the routing field to reach the originating station. Unlike transparent Spanning Tree bridging that requires time 50 seconds to converge in the event of failures source-route bridging allows multiple active paths through the network, which provides an extremely efficient way to use alternate paths in the event of a failure. Most...

Example 1714 Configuring SNTP on a Cisco 804 Router

Skynet_2(config) sntp broadcast client skynet_2(config) clock timezone CST -6 skynet_2(config) clock summer-time CDT recurring skynet_2 show sntp SNTP server Stratum Note that the SNTP has synchronized to the server 206.191.241.44 with a stratum 14, without statically configuring it. The show clock command shows the clock to be in daylight saving time. The Big show and Big D for NTP and SNTP You have already seen and used the three primary show commands for NTP and SNTP. Those commands are as...

Example 157 Initial Configuration of the Access Server Called skynetaccess

Enter configuration commands, one per line. End with CNTL Z. Router(config) hostname skynet access skynet_access(config) interface loopback 0 skynet_access(config-if) ip address 201.201.201.1 255.255.255.0 skynet_access(config-if) exit skynet_access(config) skynet_access(config) ip host r1 2001 skynet access(config) ip host r2 2002 skynet_access(config) ip host r3 2003 201.201.201.1 skynet_access(config) ip host r4 2004 201.201.201.1 skynet_access(config) ip host modem 2005 201.201.201.1...

Table D6 EIATIA449 DTE Cable Pinout DB60 to DB37

Any pin not referenced is not connected. Table D-7. EIA TIA-449 DCE Cable Pinout (DB-60 to DB-37) Any pin not referenced is not connected. Figure D-4 shows the V.35 cable assembly Table D-8 lists the DTE pinout Table D-9 lists the * indicates DTE to DCE, and * indicates DCE pinout. Arrows indicate signal direction DCE to DTE.

Special Components Needed for ATM Lab Studies

I recommend the following equipment for your ATM exercises One LightSteam 1010 (LS1010) ATM switch Two or three routers with ATM interfaces If you have problems accessing LS1010, you can attend Cisco's Campus ATM Solutions class before going to a lab. The class has several LS1010s with routers, providing you with the necessary gear. Also, the Cisco ATM Solutions book provides many configuration examples labs to enhance your comfort level with ATM. This chapter focuses on the routers'...

OSPF Router Types Areas and LSAs

At the onset, we mentioned that OSPF could be considered to be CPU-intensive and difficult to configure. By now, it becomes evident that multiple SPF databases, complex algorithms, and constant CPU interrupts caused by link-state flooding can cause an increase in the router's processor utilization. To control the flooding of link states and database synchronization, OSPF deploys the use of areas. An OSPF area can be defined as a group of routers and links that divide an OSPF domain into...

Example 1214 show ip ospf database Command Output on Router john

OSPF Router with ID (192.168.250.250) (Process ID 7) Link ID ADV Router Age Seq Checksum Link count 192.168.250.9 192.168.250.9 450 0x80000033 0x1370 1 192.168.250.250 192.168.250.250 334 0x8000002A 0xD0DA 1 172.16.250.1 1740 192.168.250.6 1812 192.168.250.250 192.168.250.250 1594 Link ID 172.16.2.4 172.16.3.0 172.16.9.0 192.168.250.250 1595 192.168.250.250 848 192.168.250.250 92 0x80000030 0xDA1 0x8000000B 0xC20B 0x8000002F 0xDD02 Link ID ADV Router Age Seq Checksum Link count 192.168.250.3...

Example 135 Output from the debug confmodem and debug modem

Modem control process activation debugging is on Router debug confmodem Modem Configuration Database debugging is on Router 06 03 15 TTY1 autoconfigure probe started 06 03 18 TTY1 detection speed (38400) response ------ Fixing the cable, you now can observe a proper operating line, as in Example 1-36. The line Modem configuration succeeded and the presence of CTS is a clear indication that a valid modem has been detected.

Technical Overview of OSPF

OSPF is classless routing protocol that interfaces directly to IP as protocol 89. OSPF uses the concept of multicast hellos and dead timers to discover and maintain neighbors. Routing updates for OSPF are called link-state advertisements (LSAs). The topology table for OSPF commonly is referred to as the link-state database. OSPF floods areas with LSAs until every router in the domain has a consistent image of the network, called the link-state database. When every router has the same image of...

Configuring DLSw

For the purpose of this text, we will discuss configuring DLSw only with Token Ring and Ethernet networks. For comprehensive information on configuring DLSw for FDDI, SDLC, and QLLC, see Cisco IOS Bridging and IBM Network Solutions, by Cisco Press. Configuring DLSw involves a four-step task. Essentially, you need to create a bridge for the LAN interface and define local and remote DLSw peers. Naturally, there will be a few steps in between, but basically, that is all there is to configure for...

The Compatibility and Simplicity of HDLC

High-Level Data Link Control (HDLC) is an efficient WAN protocol based primarily on IBM's Synchronous Data Link Control (SDLC) protocol. Cisco's version of HDLC is derived from the ISO 3309 frame. Many forms of the HDLC frame exist, but Cisco's version is not compatible with any other vendors, such as Unisys's implementation of HDLC or the ISO 3309 frame. Even though these frames are similar, they are not compatible. Cisco's version of HDLC has the following characteristics Incompatibility with...

Figure 1329 LLC2 with Local Acknowledgment

As mentioned, DLSW+ provides a method of transport for SNA, NetBIOS, and NetBEUI over TCP IP. DLSW+ refers to routers as peers. When the TCP or other transport protocol makes a connection with another router, it is called a peer connection. When this type of peer connection is formed, a DLSw circuit is established between the two end stations. Data between the two end stations is passed on the circuit. A single peer can support multiple circuits. DLSW+ supports the following circuit types SNA...

CCIE Recommended Study Resources and Topics Outline

This book serves as only one of many that you will have to read during your studies. The following books are a brief list of the ones that will be of great value during your studies another list is provided on the CCIE page, mentioned previously Perlman Interconnections, Second Edition Bridges, Routers, Switches, and Internetworking Protocols Doyle Routing TCP IP, Volume I and II Halabi Internetwork Routing Architectures Caslow, Bruce Bridges, Routers, and Switches Cisco Press CCIE Network...

The CCIE Practical Exam Preparation and CCIE Practice Labs

There are no shortcuts to success, and don't waste time looking them. These words come from one of my personal heroes, retired General Colin Powell. His words of advice ring true for soldiers as well as anyone striving to become a CCIE. There exists no single source of CCIE knowledge, no all-in-one book, including this text, that will get you into the ranks of the CCIEs. And as Powell's words echo, don't waste time looking for them. At the time of this writing, September 2001, Cisco states that...

Example 1212 Configurations and Route Table of john mark mathew luke and paul

Interface EthernetO ip address 172.16.9.5 255.255.255.0 no ip directed-broadcast interface SerialO no ip address no ip directed-broadcast encapsulation frame-relay no ip mroute-cache interface SerialO.1 multipoint ip address 172.16.1.5 255.255.255.0 no ip directed-broadcast ip ospf network point-to-multipoint frame-relay map ip 172.16.1.6 121 broadcast frame-relay map ip 172.16.1.1 111 broadcast interface Serial0.2 point-to-point ip address 172.16.2.5 255.255.255.252 no ip directed-broadcast...

Example 1332 debug dlsw peer Command Output During NetBIOS Session Establishment

01 55 59 SYS-5-CONFIG_I Configured from console by console 01 55 59 LINEPROTO-5-UPDOWN Line protocol on Interface DLSw Port0, changed state to up 01 56 00 DLSw passive open 172.16.128.5 11000 - gt 2065 01 56 00 DLSw START-TPFSM peer 17 2.16.128.5 2065 event TCP-RD PIPE OPENED state DISCONN 01 56 00 DLSw dtp_action_c opening write pipe for peer 172.16.128.5 2065 01 56 00 DLSw END-TPFSM peer 17 2.16.128.5 2065 state DISCONN- gt WWR_RDOP 01 56 00 DLSw Async Open Callback 172.16.128.5 2065 - gt...

Example 141 Access List Range in Cisco IOS Software Release 120

lt 1-99 gt IP standard access list lt 100-199 gt IP extended access list lt 1000-1099 gt IPX SAP access list lt 1100-1199 gt Extended 48-bit MAC address access list lt 1200-1299 gt IPX summary address access list lt 1300-1999 gt IP standard access list expanded range lt 200-299 gt Protocol type-code access list lt 2000-2699 gt IP extended access list expanded range lt 300-399 gt DECnet access list lt 400-499 gt XNS standard access list lt 500-599 gt XNS extended access list lt 600-699 gt...

Table A5 ISDN Progress Description Field Values

The call is not end-to-end ISDN further call progress information may be available in-band. The destination address is non-ISDN. The origination address is non-ISDN. In-band information or an appropriate pattern is now available. A delay in response has occurred at the destination interface. All other values for the Progress description field are reserved.