display isis route

Use display isis route to display IS-IS IPv4 routing information.

Syntax

display isis route [ ipv4 [ ip-address mask-length ] ] [ [ level-1 | level-2 ] | verbose ] * [ process-id ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ipv4: Displays IS-IS IPv4 routing information (the default).

ip-address mask-length: Displays IS-IS IPv4 routing information for the specified IP address. The mask-length argument is in the range of 0 to 32.

verbose: Displays detailed IS-IS IPv4 routing information. If you do not specify this keyword, the command displays brief IS-IS IPv4 routing information

process-id: Displays IS-IS IPv4 routing information for an IS-IS process specified by its ID in the range of 1 to 65535. If you do not specify an IS-IS process, this command displays routing information for all IS-IS processes.

level-1: Displays Level-1 IS-IS routes.

level-2: Displays Level-2 IS-IS routes.

Usage guidelines

If you do not specify a level, this command displays both Level-1 and Level-2 routing information.

Examples

# Display brief IS-IS IPv4 routing information.

<Sysname> display isis route

                         Route information for IS-IS(1)
                         -----------------------------

                         Level-1 IPv4 Forwarding Table
                         -----------------------------

 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 8.8.8.0/24           10         NULL    Vlan100         Direct          D/L/-
 9.9.9.0/24           20         NULL    Vlan100         8.8.8.5         R/L/-

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

                         Level-2 IPv4 Forwarding Table
                         -----------------------------

 IPv4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags
-------------------------------------------------------------------------------
 8.8.8.0/24           10         NULL                                    D/L/-

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

Table 76: Command output

Field	Description
Route information for IS-IS(1)	Route information for IS-IS process 1.
Level-1 IPv4 Forwarding Table	IS-IS IPv4 routing information for Level-1.
Level-2 IPv4 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPv4 Destination	IPv4 destination address.
IntCost	Internal cost.
ExtCost	External cost.
ExitInterface	Output interface.
NextHop	Next hop.
Flags	Routing state flag: D—Direct route. R—The route has been added into the routing table. L—The route has been advertised in an LSP. U—Penetration flag. Setting it to UP can prevent an LSP sent from L2 to L1 from being sent back to L2.

# Display detailed IS-IS IPv4 routing information.

<Sysname> display isis route verbose

                         Route information for IS-IS(1)
                         -----------------------------

                         Level-1 IPv4 Forwarding Table
                         -----------------------------

 IPV4 Dest : 8.8.8.0/24          Int. Cost : 10               Ext. Cost : NULL
 Admin Tag : -                   Src Count : 2                Flag      : D/L/-
 NextHop   :                     Interface :                  ExitIndex :
    Direct                             Vlan100                    0x00000000
 Nib ID    : 0x0

 IPV4 Dest : 9.9.9.0/24          Int. Cost : 20               Ext. Cost : NULL
 Admin Tag : -                   Src Count : 1                Flag      : R/L/-
 NextHop   :                     Interface :                  ExitIndex :
    8.8.8.5                            Vlan100                    0x00000003
 Nib ID    : 0x0

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

                         Level-2 IPv4 Forwarding Table
                         -----------------------------

 IPV4 Dest : 8.8.8.0/24          Int. Cost : 10               Ext. Cost : NULL
 Admin Tag : -                   Src Count : 2                Flag      : D/L/-

      Flags: D-Direct, R-Added to Rib, L-Advertised in LSPs, U-Up/Down bit set

Table 77: Command output

Field	Description
Route information for IS-IS(1)	Route information for IS-IS process 1.
Level-1 IPv4 Forwarding Table	IS-IS IPv4 routing information for Level-1.
Level-2 IPv4 Forwarding Table	IS-IS IPv4 routing information for Level-2.
IPV4 Dest	IPv4 destination.
Int. Cost	Internal cost.
Ext. Cost	External cost.
Admin Tag	Tag.
Src Count	Count of advertising sources.
Flag	Route state flag: R—The route has been installed into the routing table. L—The route has been flooded in an LSP. U—Route leaking flag. Setting it to UP can prevent an LSP sent from L2 to L1 from being sent back to L2.
Next Hop	Next hop.
Interface	Output interface.
ExitIndex	Index of the output interface.
Nib ID	ID assigned by the routing management module (next hop index).

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