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Re: Oddities with MLS? Maybe? [7:79614] posted 11/21/2003
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Why I can not post new message, but I can sent the reply message to news
group only, please help
""Jenny McLeod""   Has anyone come across any bugs with MLS on a Cat 6509
running 7.3(2),
with
> an MSFC2 running 12.1(11b)E4?
> We have been having intermittent problems with routing loops.  The network
> is complex enough that I am not going to try ASCII art or a detailed
> description :-)
> On all routers, show ip route indicates the correct path.  However traffic
> has been looping between routers.  This has generally happened after a
> topology change (e.g. a failed link causes traffic to use a dial-up link -
> when the original link recovers and the dialup drops out, traffic may
still
> be directed towards the dialup link, presumably by a cached entry in
> something).  The 6509 appears to be involved whenever this happens.
> I'm no expert on MLS, but there is something that I'd like to clarify...
> on the switch, show mls gives...
>
> Total packets switched = 15422843
> Total bytes switched = 5098250080
> Total routes = 2440
> [snipped]
> Module 15 is the designated MSFC for installing CEF entries
> [snipped]
>
> which indicates to me that the MSFC is the RP for MLS on this SE.
> However, on the MSFC,
>
> router#sh mls rp
> ip multilayer switching is globally disabled
> ipx multilayer switching is globally disabled
> ipx mls inbound acl override is globally disabled
> mls id is 0009.1231.6900
> mls ip address 0.0.0.0
> mls ip flow mask is unknown
> mls ipx flow mask is unknown
> number of domains configured for mls 0
>
> which looks to me as if MLS is disabled.  Am I reading this right?
> If I'm reading this right, where the [censored] is the switch getting its
> MLS information from??  show mls entry with various routes indicates dodgy
> next-hops (intermittently at least).
> MLS is just a default configuration on the switch and I think on the
router.
>
> Thanks,
> JMcL
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