display isis route

Function

The display isis route command displays IS-IS routing information.

Format

display isis route [ process-id | vpn-instance vpn-instance-name ] ipv6 [ verbose | [ level-1 | level-2 ] | ipv6-address [ prefix-length ] ] ^*

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

display isis process-id route ipv6 [ verbose | [ level-1 | level-2 ] | ipv6-address [ prefix-length ] ] ^*

Parameters

Parameter	Description	Value
process-id	Specifies an IS-IS process ID.	The value is an integer that ranges from 1 to 65535.
vpn-instance vpn-instance-name	Specifies the IS-IS multi-instance process in a specified VPN instance.	The value must be an existing VPN instance name.
ipv4	Displays IPv4 routes. If this parameter is not specified, both IPv4 and IPv6 IS-IS routes are displayed.	-
verbose	Displays detailed routing information.	-
level-1	Displays Level-1 IS-IS routes.	-
level-2	Displays Level-2 IS-IS routes.	-
ip-address	Displays the routes with the specified IPv4 destination address.	The value is in dotted decimal notation.
mask	Specifies the mask of an IP address.	The value is in dotted decimal notation.
mask-length	Specifies the mask length of an IP address.	The value is an integer that ranges from 0 or 32.
ipv6	Displays IPv6 routes. If this parameter is not specified, both IPv4 and IPv6 IS-IS routes are displayed.	-
ipv6-address	Displays the routes with the specified IPv6 destination address.	The value is a 32-digit hexadecimal number, in X:X:X:X:X:X:X:X format.
prefix-length	Specifies the prefix length of an IPv6 address.	The value is an integer that ranges from 0 to 128.

Views

All views

Default Level

1: Monitoring level

Usage Guidelines

You can run the display isis route command to check IS-IS routing information.

Example

# Display all IS-IS routes.

<HUAWEI> display isis route

                                                                                
                         Route information for ISIS(1)                          
                         -----------------------------                          
                                                                                
                        ISIS(1) Level-1 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.2.1.0/24          10         NULL    Vlanif10        Direct          D/-/L/- 
172.18.0.0/16        20         NULL    Vlanif10        10.2.1.1        A/-/L/- 
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                
                                                                                
                                                                                
                        ISIS(1) Level-2 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.2.1.0/24          10         NULL    Vlanif10        Direct          D/-/L/- 
172.18.0.0/16        20         NULL    Vlanif10        10.2.1.1        A/-/L/-                                
                                                                                
 IPV6 Dest.           ExitInterface   NextHop                       Cost       Flags 
------------------------------------------------------------------------------- 
 FC00:0:0:200::/64    Vlanif10        Direct                        10         D/L/- 
                                                                                
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set

**Table 1** Description of the display isis route command output
Item	Description
IPV4 Destination	IPv4 destination address and mask.
IPV6 Dest.	IPv6 destination address and mask.
IntCost	IPv4 internal cost or IS-IS route cost. To change the IS-IS IPv4 route cost, run the circuit-cost or isis cost command to set the link cost of an IS-IS IPv4 interface.
ExtCost	IPv4 external cost or cost of routes imported from other routing protocols. To set the cost of imported routes, run the import-route command. NOTE: The costs of external routes imported using the import-route cost-type external command are displayed in this field to differentiate the costs of IS-IS routes.
Cost	IPv6 route cost. To change the IS-IS IPv6 route cost, run the ipv6 circuit-cost or isis ipv6 cost command to set the link cost of an IS-IS IPv6 interface.
ExitInterface	Outbound interface of a route.
NextHop	Next hop address of a route. This field displays Direct if the destination network segment is the direct network segment.
Flags	Route flag: D-Direct: indicates a direct route. A-Added to URT: indicates that a route is added to the unicast routing table. L-Advertised in LSPs: indicates that a route is advertised through an LSP. S-IGP Shortcut: indicates that the interface on which IGP-Shortcut is enabled exists on the path to the destination. U-Up/Down Bit Set: indicates the Up/Down bit.

# Display IS-IS IPv4 routes.

<HUAWEI> display isis route ipv4

                                                                                
                         Route information for ISIS(1)                          
                         -----------------------------                          
                                                                                
                        ISIS(1) Level-1 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.1.1.0/24          10         NULL    Loop1           Direct          D/-/L/- 
10.2.2.0/24          10         NULL    Loop2           Direct          D/-/L/- 
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                
                                                                                
                                                                                
                        ISIS(1) Level-2 Forwarding Table                        
                        --------------------------------                        
                                                                                
IPV4 Destination     IntCost    ExtCost ExitInterface   NextHop         Flags   
------------------------------------------------------------------------------- 
10.1.1.0/24          10         NULL    Loop1           Direct          D/-/L/- 
10.2.2.0/24          10         NULL    Loop2           Direct          D/-/L/- 
     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set

# Display detailed IS-IS routing information.

<HUAWEI> display isis route verbose

                         Route information for ISIS(1)
                         -----------------------------

                        ISIS(1) Level-1 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif10                 0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif20                 0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : A/L/-
 Priority   : Low
 NextHop    :                    Interface :               ExitIndex :
    10.2.0.2                           Vlanif20                 0x00000003
    10.0.0.2                           Vlanif10                 0x00000005

 IPV4 Dest  : 10.4.1.1/32        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 1             Flags     : A/L/-
 Priority   : Medium
 NextHop    :                    Interface :               ExitIndex :
    10.0.0.2                           Vlanif10                 0x00000005
 (B)10.2.0.2                           Vlanif20                 0x00000003

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set                                



                        ISIS(1) Level-2 Forwarding Table
                        --------------------------------

 IPV4 Dest  : 10.0.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif10                 0x00000000

 IPV4 Dest  : 10.1.0.0/24        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 3             Flags     : D/L/-
 Priority   : -
 NextHop    :                    Interface :               ExitIndex :
    Direct                             Vlanif20                 0x00000000

 IPV4 Dest  : 10.2.0.0/24        Int. Cost : 20            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-
 Priority   : Low

 IPV4 Dest  : 10.3.1.1/32        Int. Cost : 10            Ext. Cost : NULL
 Admin Tag  : -                  Src Count : 2             Flags     : -/-/-
 Priority   : Medium

     Flags: D-Direct, A-Added to URT, L-Advertised in LSPs, S-IGP Shortcut,     
                               U-Up/Down Bit Set

**Table 2** Description of the display isis route verbose command output
Item	Description
IPV4 Dest	IPv4 destination address and mask.
Int.Cost	IPv4 internal cost, the cost of an IS-IS route.
Ext.Cost	IPv4 external cost, the cost of other protocol route imported by IS-IS. NOTE: The costs of non-IS-IS routes imported by the import-route cost-type external command are displayed in this field so that the costs of non-IS-IS routes are kept independently from the costs of IS-IS routes.
Admin Tag	Administrative tag.
Src Count	Number of source addresses to the same destination.
Priority	Convergence priority of IS-IS routes: Critical High Medium Low To set the convergence priority of IS-IS routes, run the prefix-priority command.
NextHop	Next hop of a route. The next hop (B) tag of a route is a backup route tag.
Interface	Outbound interface of a route.
ExitIndex	Index of the outbound interface.
Flags	Flags of routing information