Inspecting CPU Utilization

Enter the show processes cpu command to investigate high CPU utilization. High utilization causes network performance problems. For example, knowing when the router is running at over 50 utilization is critical. The router might start dropping packets if an unexpected traffic burst comes through or if OSPF gets recalculated. Fast switching reduces CPU utilization. CPU utilization for five seconds 2 0 one minute 1 five minutes 14 CPU utilization for five seconds 2 0 one minute 1 five minutes 14...

Task 5 Confirming the Final Running Config

After completing the tasks in this section, the Cisco AS5300's final running configuration looks like this Last configuration change at 05 59 00 UTC Mon Nov 1 1999 by admin NVRAM config last updated at 05 59 02 UTC Mon Nov 1 1999 by admin service timestamps debug datetime msec localtime show-timezone service timestamps log datetime msec localtime show-timezone service password-encryption logging buffered 10000 debugging no logging console aaa new-model aaa authentication login default local aaa...

Cisco AS5300 Configuration

Cisco AS5x00 Case Study for Basic IP Modem Services j username admin password 7 045802150C2E username dude password 7 070C285F4D06 spe 1 0 1 7 firmware location bootflash mica-modem-pw.2.7.1.0.bin spe 2 0 2 7 firmware location bootflash mica-modem-pw.2.7.1.0.bin ip subnet-zero no ip source-route ip host dirt 172.22.100.9 ip domain-name mauionions.com ip name-server 172.22.11.10 ip name-server 172.22.12.11 async-bootp dns-server 172.30.10.1 172.30.10.2 isdn switch-type primary-5ess mta receive...

Upgrading Modem Firmware

Cisco regularly enhances modem DSP code to improve modem performance. To obtain the latest DSP code, upgrade the NAS modem firmware. Figure 6-1 summarizes the firmware upgrade procedure. Figure 6-1 Modem Firmware Download Operation Example Figure 6-1 Modem Firmware Download Operation Example Mica-modem-pw.x.x.x.x. (portware file) Mica-modem-pw.x.x.x.x. (portware file) Download the portware from CCO to a TFTP server or directly into the NAS. Step 1 Read the latest modem release notes about modem...

Configuration Design Parameters

Before the equipment is deployed at the customer sites, both companies define the following configuration design parameters IP subnetting and address strategy Note This case study uses private RFC 1918 IP addresses. For more information, refer to the following URL Note This case study uses private RFC 1918 IP addresses. For more information, refer to the following URL Table 1-5 through Table 1-7 describe the IP subnetting plan, device parameters, and dial plan. The headquarters portion of the...

Using the Cisco Ios Exec Cli

The Cisco IOS command line interface (CLI) contains many modem management show commands. Use these commands to gather and view modem statistics. This section provides a bulleted list detailing some of the most useful commands. Here is a list of the show modem command options < 0-2> at-mode call-stats configuration connect-speeds cookie csm group log operational-status summary test version Display a summary of the modem call statistics Incoming calls Outgoing calls Busied Failed No Succ...

Task 2 Initiating and Inspecting a V90 Test Call

Before you let users dial in to the NAS, initiate and inspect a V.90 test call. V.90 call performance is heavily dependent upon the telco's network topology. There are many variables. Most modem manufactures have unique AT command sets. The AT commands used in the following procedure might not be supported by your modem. For more information, see the following URLs Step 1 Locate a client PC, client modem, and an analog line. The following figure shows the network environment for this test. Step...

Analyzing the System Boot Dialog

The Cisco AS5300 has a specific boot sequence. To view the boot sequence through a terminal session, you must have a console connection to the access server before it powers up. System Bootstrap, Version 11.2(9)XA, RELEASE SOFTWARE (fc2) Copyright (c) 1997 by cisco Systems, Inc. AS5300 platform with 65536 Kbytes of main memory program load complete, entry point 0x80008000, size 0xf5914 Self decompressing the image OK Notice NVRAM invalid, possibly due to write erase. program load complete,...

Matching the Cisco IOS Images

The dial shelf and router shelf run separate Cisco IOS images Both images must be from the same Cisco IOS Release. They must match. The router shelf's image is in the Cisco 7206's Flash memory. It begins with c5800. The dial shelf's image is in the DSC card. It begins with dsc. On the router shelf, check the Cisco IOS image, uptime, and restart reason Cisco Internetwork Operating System Software IOS (tm) 5800 Software (C5800-P4-M), Version 12.0(4)XL1, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)...

Task 4 Configuring the Serial Interfaces

Configure the serial D channels to route incoming voice calls from the PSTN to the integrated modems. The behavior of the B channels is controlled by the D channels' configuration instructions. The D channel is the signaling channel. After timeslots are assigned by the pri-group command, D-channel serial interfaces are automatically created in the configuration file (for example S0 23, S1 23, and so on). Individual B-channel serial interfaces are created as rotary members of their signaling D...

Task 1 Initiating a Modem Loopback Test Call

Test the access server's ability to initiate and terminate a modem call. Similar to sending a ping to the next-hop router, this test verifies basic connectivity for modem operations. Successfully performing this test gives you a strong indication that remote clients should be able to dial into the NAS. Figure 4-6 shows this test. After completing this test, dial into the EXEC from a client PC and a client modem (no PPP). Figure 4-6 Initiating and Terminating a Modem Call on the Same NAS Note...

Modem Autoconfigure K56Flex Example

The following modem-autoconfigure string disables V.8bis K56Flex. The string & F& D2s53 0 is applied to two MICA modems. Disabling V.8bis reduces trainup time by about two seconds, and it prevents trainup problems with older client modems. Step 1 Watch the modem autoconfigure function run, so you can see if there are any typos in the modem string Modem Configuration Database debugging is on 53 0 0-NAS show debug Modem Autoconfig Modem Configuration Database debugging is on 53 0 0-NAS...

Task 3 Enabling the T3T1 Controllers

Configure the settings for the T3 T1 controllers. They must match the telco's settings on the telephone switch. Mismatched settings cause problems sometimes these problems are not detected for a long time. Figure 3-4 shows that a T3 trunk card requires T1 and T3 controller configuration settings. Figure 3-4 Matching Controller Settings controller T3 1 0 0 framing m23 t1 4 controller Step 2 Configure the controller T3. There are 28 T1 controllers in one T3. In this example, only the fourth...

Exploring the Cisco IOS File System

Get familiar with the file system and memory storage areas. The Cisco IOS File System (IFS) provides a consolidated interface to The Flash memory file system The network file system (TFTP, rcp, and FTP) Any other endpoint for reading or writing data (such as NVRAM, modem firmware, the running configuration, ROM, raw system memory, Xmodem, and Flash load helper log). IFS first appeared in Cisco IOS Releases 11.3 AA and 12.0. For more information about IFS, refer to the chapter Using the Cisco...