Administrator Guide

Example of the show isis database Command to View Level 1-2 Link State Databases
To view which IS-type is congured, use the show isis protocol command in EXEC Privilege mode. The show config
command in ROUTER ISIS mode displays only non-default information, so if you do not change the IS-type, the default value
(level-1-2) is not displayed.
The default is Level 1-2 router. When the IS-type is Level 1-2, the software maintains two Link State databases, one for each level. To
view the Link State databases, use the show isis database command.
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 1088 0/0/0
eljefe.00-00 * 0x00000009 0xF76A 1126 0/0/0
eljefe.01-00 * 0x00000001 0x68DF 1122 0/0/0
eljefe.02-00 * 0x00000001 0x2E7F 1113 0/0/0
Dell.00-00 0x00000002 0xD1A7 1102 0/0/0
IS-IS Level-2 Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime ATT/P/OL
B233.00-00 0x00000006 0xC38A 1124 0/0/0
eljefe.00-00 * 0x0000000D 0x51C6 1129 0/0/0
eljefe.01-00 * 0x00000001 0x68DF 1122 0/0/0
eljefe.02-00 * 0x00000001 0x2E7F 1113 0/0/0
Dell.00-00 0x00000004 0xCDA9 1107 0/0/0
Dell#
Controlling Routing Updates
To control the source of IS-IS route information, use the following command.
• Disable a specic interface from sending or receiving IS-IS routing information.
ROUTER ISIS mode
passive-interface interface
– For the Loopback interface on the RPM, enter the keyword loopback then a number from 0 to 16383.
– For a port channel, enter the keywords port-channel then a number from 1 to 255.
– For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/ port information.
– For a 40-Gigabit Ethernet interface, enter the keyword FortyGigabitEthernet then the slot/port information.
– For a VLAN, enter the keyword vlan then a number from 1 to 4094.
Distribute Routes
Another method of controlling routing information is to lter the information through a prex list.
Prex lists are applied to incoming or outgoing routes and routes must meet the conditions of the prex lists or the Dell Networking
OS does not install the route in the routing table. The prex lists are globally applied on all interfaces running IS-IS.
Congure the prex list in PREFIX LIST mode prior to assigning it to the IS-IS process. For conguration information on prex lists,
refer to Access Control Lists (ACLs).
Applying IPv4 Routes
To apply prex lists to incoming or outgoing IPv4 routes, use the following commands.
NOTE: These commands apply to IPv4 IS-IS only. To apply prex lists to IPv6 routes, use ADDRESS-FAMILY IPV6 mode,
shown later.
• Apply a congured prex list to all incoming IPv4 IS-IS routes.
ROUTER ISIS mode
distribute-list prefix-list-name in [interface]
Intermediate System to Intermediate System
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