Dell Force10 S4810P

Intermediate System to Intermediate System | 593
Use either or both of the commands in ROUTER ISIS mode to configure a simple text password.
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.
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 27-9, 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
Command Syntax Command Mode Purpose
area-password [hmac-md5]
password
ROUTER ISIS Configure authentication password for an area. FTOS
supports HMAC-MD5 authentication.
This password is inserted in Level 1 LSPs, Complete
SNPs, and Partial SNPs.
domain-password [encryption-type |
hmac-md5] password
ROUTER ISIS 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.
Command Syntax Command Mode Purpose
set-overload-bit
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.