Dell Force10 Z9000 FTOS Configuration Guide for Z9000 System - Page 509

Use either or both of the commands in ROUTER ISIS mode to configure a simple text password. Command Syntax area-password [hmac-md5] password domain-password [encryption-type | hmac-md5] password Command Mode ROUTER ISIS ROUTER ISIS Purpose Configure authentication password for an area. FTOS supports HMAC-MD5 authentication. This password is inserted in Level 1 LSPs, Complete SNPs, and Partial SNPs. Set the authentication password for a routing domain. FTOS supports both DES and HMAC-MD5 authentication methods. This password is inserted in Level 2 LSPs, Complete SNPs, and Partial SNPs. Use the show config command in ROUTER ISIS mode or the show running-config isis command in EXEC Privilege mode to view the passwords. Remove a password by using either the no area-password or no domain-password command in ROUTER ISIS mode. Set the overload bit Another use for the overload bit is to prevent other routers from using this router as an intermediate hop in their shortest path first (SPF) calculations. For example, if the IS-IS routing database is out of memory and cannot accept new LSPs, FTOS sets the overload bit and IS-IS traffic continues to transit the system. Use this command the following command in ROUTER ISIS mode to set the overload bit manually. Command Syntax set-overload-bit Command Mode Purpose ROUTER ISIS Set the overload bit in LSPs. This prevents other routers from using it as an intermediate hop in their shortest path first (SPF) calculations. Enter no set-overload-bit to remove the overload bit. When the bit is set, a 1 is placed in the OL column in the show isis database command output. In Figure 23-9, the overload bit is set in both the Level-1 and Level-2 database because the IS type for the router is Level-1-2 Intermediate System to Intermediate System | 509