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Interface Vlan is not installed in routing table

Unanswered Question
Jul 22nd, 2014
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Dear All, 

Today I faced a strange problem and I want to share it with you to find what is the problem ? 

we have a VRF for one customer and we use interface vlan to define customer's branch.

 

The customer interface is  VLAN 422 and it is defined under customer VRF probably . 

PE#sh running-config vrf  V3056:RIYADHBANK
Building configuration...

Current configuration : 1321 bytes
ip vrf V3056:RIYADHBANK
 rd 65000:3887
 maximum routes 1400 80
 route-target export 65000:5405
 route-target import 65000:5405
 route-target import 65000:5406
!
!
interface Vlan422
 description By *****
 ip vrf forwarding V3056:RIYADHBANK
 ip address 172.29.12.97 255.255.255.252
 service-policy input 2M_IN
!

PE#sh vlan id 422

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
422   422                                 active    Gi3/0/11 efp_id 422

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
422  enet  100422     1500  -      -      -        -    -        0      0   

Remote SPAN VLAN
----------------
Disabled

Primary Secondary Type              Ports
------- --------- ----------------- ------------------------------------------

PE#

we can see the interface vlan is up 

PE-L3Agg-Khu-107-2#sh int vlan 422 description 
Interface                      Status         Protocol Description
Vl422                          up             up       ****
PE#

and we can see the vlan 422 belongs to the correct VRF

PE#sh vrf V3056:RIYADHBANK
  Name                             Default RD          Protocols   Interfaces
  V3056:RIYADHBANK                 65000:3887          ipv4        Vl627
                                                                   Vl775
                                                                   Vl422
PE#

when we tried to troubleshoot the customer routing we found :

 

PE-L3Agg-Khu-107-2#ping vrf V3056:RIYADHBANK 172.29.12.97

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.29.12.97, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
PE-#

we could not ping the ip address of interface vlan 422.

 

PE#sh ip route vrf V3056:RIYADHBANK 172.29.12.97

Routing Table: V3056:RIYADHBANK
% Subnet not in table
PE#

PE#show ip route vrf V3056:RIYADHBANK connected 

Routing Table: V3056:RIYADHBANK
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U - per-user static route
       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP
       + - replicated route, % - next hop override

Gateway of last resort is 192.168.111.16 to network 0.0.0.0

      172.29.0.0/16 is variably subnetted, 338 subnets, 2 masks
C        172.29.12.44/30 is directly connected, Vlan627
L        172.29.12.45/32 is directly connected, Vlan627
PE-L3Agg-Khu-107-2#
PE-L3Agg-Khu-107-2#

 

My question is: Why the interface vlan 422 is not installed in VRF Table as it is UP ?? 

 

thanks in advance!

Rashed Wardi.

 

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bhnegi Wed, 07/23/2014 - 18:09
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  • Cisco Employee,

what platform is this? can you please paste the output of show version  and show run?

Also when you tested this was int Gi3/0/11  up/up?

Best Regards,

Bheem

rashed_wardi Wed, 09/24/2014 - 01:31
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WE GOT IT,

THE PROBLEM WAS THE LIMIT UNDER VRF

maximum routes 1400 80

 

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