View Detailed FAN Transit Information

About this task

Use this procedure to verify detailed FAN Transit information of a switch acting as a transit node in a FAN. Transit nodes are not members of the FAN and only forward FAN traffic.

This procedure also includes verification on the FAN member nodes.

Procedure

Verification on FAN member nodes:

  1. Verify that the node is a FAN member:

    show isis

  2. Verify that the node signals FAN membership on TLV 147:

    show isis lsdb local tlv 147 detail

  3. Verify that the node creates FAN multicast FIB entries for itself and the other member nodes:

    show isis spbm multicast-fib

  4. Verify that the transit node is a part of the FAN tree:

    l2 tracetree-fan

  5. Verify that the transit node is in the SPB path between the FAN member nodes:

    show isis spbm unicast-tree <2-4059>

Verification on the transit node:

  1. Verify that the transit node is not a member of the FAN and does not signal FAN membership on TLV 147:

    show isis

    show isis lsdb local tlv 147 detail

  2. Verify that the transit node creates FAN multicast FIB entries for the FAN member nodes:

    show isis spbm multicast-fib

Example

Use the following example to verify FAN Transit information on a transit node between two end-point SPB nodes, BEB-A and BEB-B.

Two endpoint BEBs connect through a transit BCB.

Verification on BEB-A:

Note

Note

You can run the following commands on either BEB-A or BEB-B. The following example displays the sample outputs for BEB-A.

Verify that BEB-A is a member of the FAN. The FAN Member attribute displays as Yes.

BEB-A:1#show isis                                                       
========================================================================================
                               ISIS General Info                       
========================================================================================
                            AdminState : enabled    
                            RouterType : Level 1                         
                             System ID : b0ad.aa41.9c84                                   
                  Max LSP Gen Interval : 900                                 
                                Metric : wide                              
                   Overload-on-startup : 20      
                              Overload : false                        
                         Csnp Interval : 10        
                         PSNP Interval : 2    
                     Rxmt LSP Interval : 5              
                             spf-delay : 100                     
                           Router Name : BEB-A                 
                     ip source-address :                 
                   ipv6 source-address :                            
              ip tunnel source-address :               
                            Tunnel vrf :               
                         ip tunnel mtu :                    
                     Num of Interfaces : 1                  
                 Num of Area Addresses : 1
                        inband-mgmt-ip :
                              backbone : disabled
              Dynamically Learned Area : 00.0000.0000
                            FAN Member : Yes
                  Multi-Area OperState : disabled
                         Hello Padding : enabled

Verify that BEB-A signals FAN membership. FAN membership is signaled when TLV 147 displays the FAN multicast address.

BEB-A:1#show isis lsdb local tlv 147 detail

======================================================================================
                               ISIS LSDB (DETAIL)
======================================================================================
---------------------------------------------------------------------------------------

Level-1 LspID: b0ad.aa41.9c84.00-00     SeqNum: 0x00000010      Lifetime:   412
        Chksum: 0xac95  PDU Length: 122
        Host_name: BEB-A
        Attributes: IS-Type 1
TLV:147 Chassis MAC: b0:ad:aa:41:9c:00

TLV:147 FAN Mcast Addr: b1:ad:aa:41:9c:84

Verify that BEB-A creates FAN multicast FIB entries for itself and other FAN nodes on I-SID 16777001:

BEB-A:1#show isis spbm multicast-fib
========================================================================================================
                                             SPBM MULTICAST FIB ENTRY INFO
========================================================================================================
MCAST DA           ISID      BVLAN SYSID           HOST-NAME           OUTGOING-INTERFACES    INCOMING
                                                                                              INTERFACE
--------------------------------------------------------------------------------------------------------
65:6a:52:ce:04:84  16777001  4058  646a.52ce.0484  BEB-B                                       1/20
65:6a:52:ce:04:84  16777001  4059  646a.52ce.0484  BEB-B                                       1/20
b1:ad:aa:41:9c:84  16777001  4058  b0ad.aa41.9c84  BEB-A                1/20                   cpp

-------------------------------------------------------------------------------------------------------
Total number of SPBM MULTICAST FIB entries 3

Verify that the transit node is in the SPB path between the FAN end-points BEB-A and BEB-B. 4058 and 4059 are the SPB B-VIDs.

Note

Note

You can view the SPB B-VIDs by executing the command show isis spbm.

BEB-A:1#show isis spbm unicast-tree 4058
Node:646a.52ce.0484 (BEB-B) -> Node:f873.a202.53df (TRANSIT) -> ROOT
Node:f873.a202.53df (TRANSIT) -> ROOT
BEB-A:1#show isis spbm unicast-tree 4059
Node:646a.52ce.0484 (BEB-B) -> Node:f873.a202.53df (TRANSIT) -> ROOT
Node:f873.a202.53df (TRANSIT) -> ROOT

Verify that the transit node is a part of the FAN tree:

BEB-A:1#l2 tracetree-fan

Please wait for l2tracetree to complete or press any key to abort

l2tracetree to b1:ad:aa:41:9c:84, vlan 4058 i-sid 16777001 nickname 0.11.03 hops 64
1   BEB-A            b0:ad:aa:41:9c:84 -> TRANSIT           f8:73:a2:02:53:df
2   TRANSIT          f8:73:a2:02:53:df -> BEB-B             64:6a:52:ce:04:84

Verification on the Transit node:

Verify that the transit node is not a member of the FAN. The FAN Member parameter does not display.

TRANSIT:1#show isis
====================================================================================
                               ISIS General Info
====================================================================================
                            AdminState : enabled
                            RouterType : Level 1
                             System ID : f873.a202.53df
                  Max LSP Gen Interval : 900
                                Metric : wide
                   Overload-on-startup : 20
                              Overload : false
                         Csnp Interval : 10
                         PSNP Interval : 2
                     Rxmt LSP Interval : 5
                             spf-delay : 100
                           Router Name : TRANSIT
                     ip source-address :
              ip tunnel source-address :
                            Tunnel vrf :
                         ip tunnel mtu :
                     Num of Interfaces : 2
                 Num of Area Addresses : 1
                        inband-mgmt-ip :
                              backbone : disabled
                  Multi-Area OperState : disabled
                         Hello Padding : enabled 

Verify that the transit node does not signal FAN membership on TLV 147. The FAN Mcast Addr parameter is not displayed.

TRANSIT:1#show isis lsdb local tlv 147 detail

========================================================================================
                               ISIS LSDB (DETAIL)
========================================================================================
----------------------------------------------------------------------------------------

Level-1 LspID: f873.a202.53df.00-00     SeqNum: 0x00000013      Lifetime:  1149
        Chksum: 0x424d  PDU Length: 135
        Host_name: TRANSIT
        Attributes:     IS-Type 1
TLV:147 Chassis MAC: f8:73:a2:02:50:00

Verify the transit node creates the FAN Multicast FIB entries for the FAN end-points on I-SID 16777001.

TRANSIT:1#show isis spbm multicast-fib
========================================================================================================
                                             SPBM MULTICAST FIB ENTRY INFO
========================================================================================================
MCAST DA           ISID      BVLAN SYSID           HOST-NAME            OUTGOING-INTERFACES    INCOMING
                                                                                               INTERFACE
--------------------------------------------------------------------------------------------------------
65:6a:52:ce:04:84  16777001  4058  646a.52ce.0484  BEB-B                 1/20                   1/9
65:6a:52:ce:04:84  16777001  4059  646a.52ce.0484  BEB-B                 1/20                   1/9
b1:ad:aa:41:9c:84  16777001  4058  b0ad.aa41.9c84  BEB-A                 1/9                    1/20
b1:ad:aa:41:9c:84  16777001  4059  b0ad.aa41.9c84  BEB-A                 1/9                    1/20

-------------------------------------------------------------------------------------------------------
Total number of SPBM MULTICAST FIB entries 4
-------------------------------------------------------------------------------------------------------