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Interface IP Address in both global routing and in VRF

nmdc.kzstan
Beginner
Beginner

Hello,

Interface Gi0/0.3200 is connected to ISP and is in VRF C1:

interface GigabitEthernet0/0.3200
 encapsulation dot1Q 3200
 ip vrf forwarding C1
 ip address a.b.232.90 255.255.255.224
 ip nat outside
 ip virtual-reassembly in
end

 

#sh arp vrf C1
Protocol  Address          Age (min)  Hardware Addr   Type   Interface
Internet  a.b.232.65            0   001e.be75.7c78  ARPA   GigabitEthernet0/0.3200
Internet  a.b.232.90            -   78da.6e31.edf0  ARPA   GigabitEthernet0/0.3200

 

Interface Gi0/1.3200 is also connected to ISP and is in Global routing table.

interface GigabitEthernet0/1.3200
 encapsulation dot1Q 3200
 ip address a.b.232.94 255.255.255.224
 no ip proxy-arp
 no cdp enable
end

 

When interface Gi0/1.3200 is UP interface Gi0/0.3200' IP Address a.b.232.90 (which is in VRF C1) also appears in Global routing table.

sh ip route

       a.0.0.0/8 is variably subnetted, 3 subnets, 2 masks
C        a.b.232.64/27 is directly connected, GigabitEthernet0/1.3200
L        a.b.232.90/32 is directly connected, GigabitEthernet0/1.3200
L        a.b.232.94/32 is directly connected, GigabitEthernet0/1.3200

 

Mac address of a.b.232.90 is also in both VRF C1 and in GR so C1 connection is lost.

 

2 Replies 2

Akash Agrawal
Cisco Employee
Cisco Employee

 

 

Which platform , IOS you are using?

2921 ISR 

Current IOS c2900-universalk9-mz.SPA.154-2.T1.bin, previous IOS - c2900-universalk9-mz.SPA.151-4.M6.bin. Problem is in both versions.

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