NetTools.IPv6HopLmtMisMatch

Description

A deprecated command was used that allowed configuration of the IPv6 hop-limit only for Router Advertisements. According to RFC 4861, the IPv6 hop-limit configuration of the local VLAN interface must be the same as the advertised hop-limit in outgoing Router Advertisements. A mismatch may lead to unexpected network problems like dropped packets. The Router Advertisement hop-limit will revert to interface hop-limit value when either the interface hop-limit is configured or the system reboots.

Remedy

Use "configure ipv6 hop-limit" command to specify a hop-limit for the local VLAN interface as well as for outgoing router advertisements. It is flexible enough to allow specifying a value of zero for router advertisements and a non-zero value for the local interface.

Severity

Warning

Message Text

IPv6 hop-limit mismatch on %vlan%: Interface hop-limit is %vhl% and zero-in-ra is %unspec%, while Router Advertisement hop-limit is %rahl%

Message Parameters

Name Type
vlan String
vhl uInt8
unspec uInt
rahl uInt8