Applied Innovation AISwitch AI2524, User Manual, Page: 186 / 418

AI2524 Router Card User’s Manual
Page 9-28 August 1997
2524UM
Specify Router-Lev elSupport
It is seldom necessary to configure the IS type because the IS-IS pro-
tocol will automatically establish this. However, you can configure th
AI2524 to act as a Le vel1 (intra-area) router, as both a Level1 router
and a Leve l2 (interarea) router, or as an interarea router only.
In router configuration mode, configure the IS-IS level at which the
router is to operate:
is-type {level-1 | level-1-2 | level-2-
only}
Configure IS-IS Authentication Passwords
You can assign authentication passwords to areas and domains. An
area password is inserted in Level 1 (station router) link-state PDUs
(LSPs), complete sequence number PDUs (CSNPs), and partial se-
quence number PDUs (PSNPs). A routi ng domainauthentication
password is inserted in Leve l2 (area router) LSP, CSNP, and PSNP.
In router configuration mode, configure area or domain passwords:
1. Configure the area authentication password.
area-password password
2. Configure the routin g domainauthentication password.
domain-password password
Ignore IS-IS Link-State Packet (LSP) Errors
You can configure the router to ignore IS-IS LSPs that are received
with internal checksum errors, rather than purging the LSPs. LSPs are
used by the receiving routers to maintain their routing tables.
The IS-IS protocol definition requires that a received LSP with an in-
correct data-link checksum be purged by the receiver, which causes
the initiator of the LSP to regenerate it. However, if a network has a
link that causes data corruption while still delivering LSPs with correct
data-link checksums, a continuous cycle of purging and regenerating
large numbers of LSPs can occur, rendering the network nonfunc-
tional.
In router configuration mode, allow the router to ignore LSPs with an
internal checksum error:
ignore-lsp-errors