Users Guide

ROUTER ISIS mode
is-type {level-1 | level-1-2 | level-2}
To view which IS-type is configured, use the show isis protocol command in EXEC Privilege mode. The show config
command in ROUTER ISIS mode displays only non-default information. 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.
DellEMC#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
Force10.00-00 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
Force10.00-00 0x00000004 0xCDA9 1107 0/0/0
DellEMC#
Controlling Routing Updates
To control the source of IS-IS route information, use the following command.
● Disable a specific interface from sending or receiving IS-IS routing information.
ROUTER ISIS mode
passive-interface interface
○ For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/port/subport information.
○ For a 25-Gigabit Ethernet interface, enter the keyword twentyFiveGigE then the slot/por[/subport]t information.
○ For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port/subport information.
○ For a 50-Gigabit Ethernet interface, enter the keyword fiftyGigE then the slot/port/subport information.
○ For a 100-Gigabit Ethernet interface, enter the keyword hundredGigE then the slot/port information.
○ For a Loopback interface, enter the keyword loopback then a number from 0 to 16383.
○ For a port channel interface, enter the keywords port-channel then a number.
○ For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Distribute Routes
Another method of controlling routing information is to filter the information through a prefix list.
Prefix lists are applied to incoming or outgoing routes and routes must meet the conditions of the prefix lists or Dell EMC
Networking OS does not install the route in the routing table. The prefix lists are globally applied on all interfaces running IS-IS.
Configure the prefix list in PREFIX LIST mode prior to assigning it to the IS-IS process. For configuration information on prefix
lists, refer to Access Control Lists (ACLs).
Applying IPv4 Routes
To apply prefix lists to incoming or outgoing IPv4 routes, use the following commands.
NOTE:
These commands apply to IPv4 IS-IS only. To apply prefix lists to IPv6 routes, use ADDRESS-FAMILY IPV6 mode,
shown later.
Intermediate System to Intermediate System 459