IPv6 addresses are present on VAPs even if IPv6 is disabled in VAP group configuration

book

Article ID: 167940

calendar_today

Updated On:

Products

XOS

Issue/Introduction

The link-local IPv6 addresses are listed on VAPs even if no enable-ipv6 is specifiedVAP group is configured with the no enable-ipv6 statement but when connected to the specified VAP the Link-Local IPv6 address is shown in ifconfig:

# ifconfig
....
ext       Link encap:Ethernet  HWaddr 00:03:D2:F1:02:0A
          inet addr:15.15.15.1  Bcast:15.15.15.255  Mask:255.255.255.0
          inet6 addr: fe80::203:d2ff:fef1:20a/64 Scope:Link
          UP BROADCAST DEBUG RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10 errors:0 dropped:51167 overruns:0 frame:0
          TX packets:0 errors:0 dropped:593444 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:600 (600.0 b)  TX bytes:0 (0.0 b)
....
 

Cause

Addresses prefixed with fe80::/64  are Link-Local addresses. Link-Local addresses are designed to be used for addressing on a  single link for purposes such as automatic address configuration, neighbor discovery or when no routers are present.

Resolution

It is a normal behavior that Link-Local addresses appear on the VAP even if the no enable-ipv6 statement is specified in the VAP group configuration.

Workaround

NA