Cisco Bug: CSCup44799 - ASR9k BNG-Suppress local ARP entries for each IPoE subscriber interface
Feb 16, 2018
- Cisco ASR 9000 Series Aggregation Services Routers
Known Affected Releases
Symptom: On an ASR9k acting as a BNG aggregating IPoE subscribers, a local ARP entry is added for each spawned IPoE subscriber interface, for each local IP address on the associated unnumbered subscriber loopback, contributing to ARP scale limitations: RP/0/RSP0/CPU0:ASR9010-C#sh arp | i Bundle-Ether333.210.ip2 Tue Jun 17 21:08:50.043 UTC 10.1.1.1 - 8478.ac2e.1eb6 Interface ARPA Bundle-Ether333.210.ip2 10.2.2.1 - 8478.ac2e.1eb6 Interface ARPA Bundle-Ether333.210.ip2 10.3.3.1 - 8478.ac2e.1eb6 Interface ARPA Bundle-Ether333.210.ip2 10.4.4.1 - 8478.ac2e.1eb6 Interface ARPA Bundle-Ether333.210.ip2 10.5.5.1 - 8478.ac2e.1eb6 Interface ARPA Bundle-Ether333.210.ip2 interface Loopback64 ipv4 address 10.1.1.1 255.255.255.0 ipv4 address 10.2.2.1 255.255.255.0 secondary ipv4 address 10.3.3.1 255.255.255.0 secondary ipv4 address 10.4.4.1 255.255.255.0 secondary ipv4 address 10.5.5.1 255.255.255.0 secondary Conditions: This is behavior is present in IOS-XR through 4.3.4 and 5.1.2 for ASR 9000s acting as a BNG aggregating IPoE subscribers.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.
Bug Details Include
- Full Description (including symptoms, conditions and workarounds)
- Known Fixed Releases
- Related Community Discussions
- Number of Related Support Cases