Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 560

area-password [hmac-md5] password Dell 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. ROUTER ISIS mode domain-password [encryption-type | hmac-md5] password Dell supports both DES and HMAC-MD5 authentication methods. This password is inserted in Level 2 LSPs, Complete SNPs, and Partial SNPs. To view the passwords, use the show config command in ROUTER ISIS mode or the show runningconfig isis command in EXEC Privilege mode. To remove a password, use either the no area-password or no domain-password commands in ROUTER ISIS mode. Setting 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, the system sets the overload bit and IS-IS traffic continues to transit the system. To set or remove the overload bit manually, use the following commands. • Set the overload bit in LSPs. ROUTER ISIS mode set-overload-bit This setting prevents other routers from using it as an intermediate hop in their shortest path first (SPF) calculations. • Remove the overload bit. ROUTER ISIS mode no set-overload-bit Example of Viewing the Overload Bit Setting When the bit is set, a 1 is placed in the OL column in the show isis database command output. 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. Dell#show isis database IS-IS Level-1 Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL B233.00-00 0x00000003 0x07BF 1074 0/0/0 eljefe.00-00 * 0x0000000A 0xF963 1196 0/0/1 eljefe.01-00 * 0x00000001 0x68DF 1108 0/0/0 eljefe.02-00 * 0x00000001 0x2E7F 1099 0/0/0 Force10.00-00 0x00000002 0xD1A7 1088 0/0/0 IS-IS Level-2 Link State Database LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL 560 Intermediate System to Intermediate System