show isis lsdb

Display the Intermediate-System-to-Intermediate-System (IS-IS) Link State Database (LSDB).

Syntax

Command Parameters

detail
Displays detailed information, which includes the Link State Packet (LSP) ID, the level of the external router, the maximum age of the LSP, the LSP sequence number and the LSP checksum.
home
Displays the IS-IS link state database information that the system configures in the home area.
ip-unicast
Displays the link state database for the ip-unicast.
ipv6-unicast
Displays the link state database for the IPv6 unicast.
i-sid <0-16777215>
Specifies the i-sid value to filter by.
level { l1 | l2 | l12 }
Displays the link state database for the specified level: l1 (Level 1), l2 (Level 2), or l12 (Level 1 and 2). The switch is a Level 1 router, which means it has only Level 1 links and can route within only one area. Level 1 routers route only within their assigned area and cannot route outside that area. Level 2 routers route between areas and toward other domains. Level 1/Level 2 routers route within an assigned area and between areas. Level 1/Level 2 routers maintain both a Level 1 link state database and a Level 2 Link State database.
local
Displays information on the local link state database.
lspid xxxx.xxxx.xxxx.xx-xx - 8 bytes
Displays the link state database for the specified Link State Packet (LSP) ID. The LSP ID is assigned to external IS-IS routing devices.
remote
Displays the IS-IS link state database information that the system configures in the remote area.
sub-tlv <1-3>
Displays the link state database for a specified sub-Type-Length-Value (TLV). Shortest Path Bridging MAC (SPBM) employs Intermediate-System-to-Intermediate-System (IS-IS) as the interior gateway protocol and implements additional TLVs to support additional functionality. TLVs exist inside IS-IS packets and Sub-TLVs exist as additional information in TLVs.
sysid xxxx.xxxx.xxxx - 6 bytes
Displays the link state database for the specified system ID.
sysid xxxx.xxxx.xxxx - 6 bytes
Displays the link state database for a specified sub-Type-Length-Value (TLV). Shortest Path Bridging MAC (SPBM) employs Intermediate-System-to-Intermediate-System (IS-IS) as the interior gateway protocol and implements additional TLVs to support additional functionality. TLVs exist inside IS-IS packets and Sub-TLVs exist as additional information in TLVs.
tlv <1-236>
Displays the link state database for a specified Type-Length-Value (TLV). Shortest Path Bridging MAC (SPBM) employs Intermediate-System-to-Intermediate-System (IS-IS) as the interior gateway protocol and implements additional TLVs to support additional functionality. TLVs exist inside IS-IS packets and give additional information.

Default

None

Command Mode

User EXEC

Command Output

The show isis lsdb command displays the following information:

Parameter

Description

LSP ID

Indicates the LSP ID assigned to external IS-IS routing devices.

LEVEL

Indicates the level of the external router: l1, l2, or l12.

LIFETIME

Indicates the maximum age of the LSP. If the max-lsp-gen-interval is set to 900 (default) then the lifetime value begins to count down from 1200 seconds and updates after 300 seconds if connectivity remains. If the timer counts down to zero, the counter adds on an additional 60 seconds, then the LSP for that router is lost. This happens because of the zero age lifetime, which is detailed in the RFC standards.

SEQNUM

Indicates the LSP sequence number. This number changes each time the LSP is updated.

CHKSUM

Indicates the LSP checksum. This is an error checking mechanism used to verify the validity of the IP packet.

HOST-NAME

Indicates the hostname listed in the LSP. If the host name is not configured, then the system name is displayed.

AREA

Indicates the type of area as home or remote.

Example

Switch:1# show isis lsdb
================================================================================
                                   ISIS LSDB
================================================================================
LSP ID                  LEVEL  LIFETIME  SEQNUM  CHKSUM   HOST-NAME      AREA  
--------------------------------------------------------------------------------
0014.c7e1.33df.00-00     1      545       0xb1    0xed28   NewYork       HOME   
0016.ca23.73df.00-00     1      1119      0x9f    0x9c9d   Switch-Lab2   HOME
0018.b0bb.b3df.00-00     1      708       0xb9    0xcb1a   Switch-Lab1   HOME 

--------------------------------------------------------------------------------
Level-1 HOME AREA: 3 out of 3 Total Num of LSP Entries
Level-1 REMOTE AREA: 0 out of 3 Total Num of LSP Entries
Level-2 HOME AREA: 0 out of 0 Total Num of LSP Entries
Level-2 REMOTE AREA: 0 out of 3 Total Num of LSP Entries
9037144-00 Rev AA