MPLS Troubleshooting commands

November 29, 2006 at 6:10 am | Posted in Blogroll, MPLS, VPN | Leave a comment

1. Control plane

  
PE1#sh ip int brief 
Interface                  IP-Address      OK? Method Status                Protocol 
FastEthernet0/0            50.50.50.2      YES NVRAM  up                    up 
Serial0/0                  150.1.1.34      YES manual up                    up 
Serial0/1                  150.1.1.18      YES manual up                    up 
Serial0/2                  unassigned      YES manual administratively down down 
Serial0/3                  192.168.1.49    YES manual up                    up 
Loopback0                  192.168.1.17    YES manual up                    up       

PE1#show ip cef summary 
IP CEF with switching (Table Version 18), flags=0x0 
  18 routes, 0 reresolve, 0 unresolved (0 old, 0 new), peak 6 
  44 leaves, 46 nodes, 51304 bytes, 52 inserts, 8 invalidations 
  0 load sharing elements, 0 bytes, 0 references 
  universal per-destination load sharing algorithm, id C55C895D 
  3(0) CEF resets, 0 revisions of existing leaves 
  Resolution Timer: Exponential (currently 1s, peak 1s) 
  0 in-place/0 aborted modifications 
  refcounts:  12657 leaf, 12544 node   

  Table epoch: 0 (18 entries at this epoch)   

Adjacency Table has 5 adjacencies   

PE1#show mpls forwarding-table 
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop 
tag    tag or VC   or Tunnel Id      switched   interface 
16     Pop tag     192.168.1.81/32   0          Se0/3      point2point 
17     Pop tag     192.168.1.64/28   0          Se0/3      point2point 
18     16          192.168.1.33/32   0          Se0/3      point2point 
19     Untagged    10.1.1.16/28[V]   0          Se0/1      point2point 
20     Untagged    10.1.1.49/32[V]   0          Se0/1      point2point 
21     Aggregate   150.1.1.16/28[V]  0 
22     Untagged    10.2.1.16/28[V]   0          Se0/0      point2point 
23     Untagged    10.2.1.49/32[V]   0          Se0/0      point2point 
24     Aggregate   150.1.1.32/28[V]  0                                
  
PE1#sh mpls interfaces 
Interface              IP            Tunnel   Operational 
Serial0/3              Yes (ldp)     No       Yes            

PE1#show mpls forwarding-table detail | in 150.1.1.16 
21     Aggregate   150.1.1.16/28[V]  0 
PE1#show mpls forwarding-table detail | b 150.1.1.16 
21     Aggregate   150.1.1.16/28[V]  0 
        MAC/Encaps=0/0, MRU=0, Tag Stack{} 
        VPN route: Customer_A 
        No output feature configured 
    Per-packet load-sharing   

PE1#show mpls forwarding-table vrf Customer_A 150.1.1.16 28 
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop 
tag    tag or VC   or Tunnel Id      switched   interface 
21     Aggregate   150.1.1.16/28[V]  0 
PE1#show mpls forwarding-table vrf Customer_A 150.1.1.16 28 detail 
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop 
tag    tag or VC   or Tunnel Id      switched   interface 
21     Aggregate   150.1.1.16/28[V]  0 
        MAC/Encaps=0/0, MRU=0, Tag Stack{} 
        VPN route: Customer_A 
        No output feature configured 
    Per-packet load-sharing   

PE1#show tag-switching tdp parameters 
Protocol version: 1 
Downstream tag generic region: min tag: 16; max tag: 100000 
Session hold time: 180 sec; keep alive interval: 60 sec 
Discovery hello: holdtime: 15 sec; interval: 5 sec 
Discovery directed hello: holdtime: 90 sec; interval: 10 sec 
Downstream on Demand max hop count: 255 
LDP for directed sessions 
LDP initial/maximum backoff: 15/120 sec 
LDP loop detection: off   

PE1#show mpls ldp parameters 
Protocol version: 1 
Downstream label generic region: min label: 16; max label: 100000 
Session hold time: 180 sec; keep alive interval: 60 sec 
Discovery hello: holdtime: 15 sec; interval: 5 sec 
Discovery targeted hello: holdtime: 90 sec; interval: 10 sec 
Downstream on Demand max hop count: 255 
LDP for targeted sessions 
LDP initial/maximum backoff: 15/120 sec 
LDP loop detection: off   

2. Data plane

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Fixed font size and tab space

November 29, 2006 at 5:46 am | Posted in Blogroll | Leave a comment
<pre> <font size="1" face="Courier New">PE1#<strong>sh mpls forwarding-table</strong>
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop  tag    tag or VC   or Tunnel Id      switched   interface             
16     0           192.168.1.81/32   0          Se0/3      point2point 
17     Aggregate   150.1.1.32/28[V]  0                                 
</font> </pre>    

The above code will displace in WS as follows  
PE1#sh mpls forwarding-table 
Local  Outgoing    Prefix            Bytes tag  Outgoing   Next Hop tag    tag or VC   or Tunnel Id      switched   interface 
16     0           192.168.1.81/32   0          Se0/3      point2point 
17     Aggregate   150.1.1.32/28[V]  0 

Show MPLS label stack

November 15, 2006 at 12:16 am | Posted in MPLS, VPN | Leave a comment

PE1#sh mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 0 192.168.1.81/32 0 Se0/3 point2point
17 Aggregate 150.1.1.32/28[V] 0
20 Aggregate 150.1.1.16/28[V] 0
21 Untagged 10.1.1.16/28[V] 0 Se0/1 point2point
22 Untagged 10.1.1.49/32[V] 0 Se0/1 point2point
23 0 192.168.1.64/28 0 Se0/3 point2point
24 17 192.168.1.33/32 0 Se0/3 point2point
26 Untagged 10.2.1.16/28[V] 0 Se0/0 point2point
27 Untagged 10.2.1.49/32[V] 0 Se0/0 point2point

PE1#sh mpls forwarding-table label 24
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
24 17 192.168.1.33/32 0 Se0/3 point2point

PE1#sh mpls forwarding-table vrf Customer_A
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
17 Aggregate 150.1.1.32/28[V] 0
26 Untagged 10.2.1.16/28[V] 0 Se0/0 point2point
27 Untagged 10.2.1.49/32[V] 0 Se0/0 point2point

PE1#sh mpls forwarding-table vrf Customer_A 10.1.2.16 detail
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
None 17 10.1.2.16/28 0 Se0/3 point2point
MAC/Encaps=4/12, MRU=1496, Tag Stack{17 20}
0F008847 0001100000014000
No output feature configured
Per-packet load-sharing

Protected: Simple MPLS VPN Lab – EIGRP in the core backbone, CE run RIPv2

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Protected: MPLS topics that need reviewing

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