Figure 175 Detailed View of ATM Links

LES MAC = 0010.2507.5031 Primacy LES/BUS

Cat-Bl-OA Cat-B10B

LES MAC = 0010.2507.5031 Primacy LES/BUS

Cat-Bl-OA Cat-B10B

Cat-B2'0A Cat-B2-0B

Secondary LE5/EUS

LJES MAC = 0010.2941 jdq31

Cat-B2'0A Cat-B2-0B

Secondary LE5/EUS

LJES MAC = 0010.2941 jdq31

Recall from Chapter 9 that careful planning of the order of LECS database can avoid unnecessary backtracking. Because Cat-B1-0A is the primary LES/BUS and is configured with PHY A as its preferred port, the combination of LS1010-A's prefix and Cat-B1-0A's ESI is listed first in the database. If this port fails, it takes 10 or more seconds for Cat-B1-0A's PHY B to become active, making it a poor choice for the secondary LES. Because Cat-B2-0B's preferred port, PHY B, should already be fully active, it is more efficient as a secondary LES address. If Cat-B2-0B's PHY B fails, the tertiary LES address can be Cat-B1-0A's PHY B. As a last resort, Cat-B2-0B's PHY A is used. For more information on this issue, see the "Dual-PHY" section of Chapter 9.

Finally, the LS1010 is configured with many of the same management options as earlier devices: SNMP, passwords, logging, a banner, and DNS.

Was this article helpful?

0 0

Post a comment