Preview Tool

Cisco Bug: CSCtd00070 - need to block same-subnet CPE-CPE connectivity when ISG is enabled

Last Modified

Jan 29, 2017

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

Symptoms: If "arp ignore local" is configured under "ip subscriber
l2-connected" submode on an interface, ISG will no longer reply to ARPs coming
to that interface if the ARPs' destination IPs are in the same subnet as the
ARP source's IP, or if the ARPs' destination IP is not in the subnet of ISG but
is routable from the interface where the ARP is received. 
Conditions: The symptom is observed if "arp ignore local" is configured under
"ip subscriber l2-connected" submode.
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.