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Cisco Bug: CSCte03209 - arp pkts incorrectly terminated on VAI in L2TP IRB with wrong cable msg

Last Modified

Feb 28, 2018

Products (1)

  • Cisco IOS

Known Affected Releases

12.4(24)T2

Description (partial)

Symptoms:On a Cisco 7206/NPE-G2 configured for IRB and L2TP, ingress ARP 
requests and replies may fail with this message according to "debug arp":
 
IP ARP: sent req src 10.10.10.2 0000.0c4d.4a20,dst 10.10.10.1 0000.0000.0000 
BVI1
IP ARP rep filtered src 10.10.10.1 000c.85ae.2e00, dst 10.10.10.2 
0000.0c4d.4a20 wrong cable, interface Virtual-Access5.
 
Conditions:
 
 bridge irb
 bridge 1 protocol ieee
 bridge 1 route ip
 
 interface BVI1
  ip address 10.10.10.2 255.255.255.0
  ip directed-broadcast
 
 interface Virtual-Template1 
  no ip address
  no peer default ip address
  ppp authentication pap chap
  bridge-group 1
  bridge-group 1 spanning-disabled
 end
 
 interface Virtual-Access5
  no ip address
  no peer default ip address
  ppp authentication pap chap
  bridge-group 1
  bridge-group 1 spanning-disabled
 
 This symptom is observed on Cisco IOS Release 12.4(15)T7, Release 12.4(15)
T9, and Release 12.4(24)T2.
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Bug Details Include

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