Following upon a comment I made yesterday about John Leser's
proposal...
> > - Require that a home agent's router advertisements always
> > contain all of the prefixes on the network that are valid
> > for home or CO addresses.
<snip>
> Would it make sense to state configuration limitations as
> a fact; then, mandate that home agents MUST (SHOULD?) check
> for inconsistencies in received router advertisements and
> report any errors?
I was thinking that in addition to the consistency
checks required by RFC 2461 section 6.2.7, the
following specific checks SHOULD be made on a home
agent when it receives a Router Advertisement on the
home subnet:
1) If the M or O flag is set in the received Router
Advertisement, verify the corresponding bit is
set in the home agents own router advertisements.
2) Verify all prefixes received in the Prefix
Information option are included in the home agent's
own AdvPrefixList.
3) If the value of the L or A flag of a received
prefix is set, verify the corresponding flag in
the home agent's AdvPrefixList is also set.
The R flag in received Prefix Information option
should be ignored by the home agent.
Any inconsistencies SHOULD be logged to system or
network management.
Ken
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