DFC3BXL question

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Sep 17th, 2008
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We have several 6500 nodes with Sup7203BXL and DFC3BXL on the line cards.

Do I manually have to enable Distributed Forwardning on the linecards?

When I execute "sho mls rp" I get "ip multilayer switching is globally disabled"

Is there any rules of thumb of when to use DFC on the linecards?

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VictorAKur Wed, 09/17/2008 - 13:02
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I am not sure you actually need it on a 6500 box with MSFC3. It does all that stuff using CEF and does not require mls rp internally. I think it does not support external mls rp at all.

jorgensor Wed, 09/17/2008 - 23:34
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OK. I must say it's a bit confusing when you see this on a 6500:

# sho 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 0019.a9b0.a800

mls ip address

mls ip flow mask is unknown

mls ipx flow mask is unknown

number of domains configured for mls 0

Giuseppe Larosa Thu, 09/18/2008 - 04:50
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Hello Jorge,

I would check using

sh mls

show cef

sh mls rp could point to an external RP that is not present, the Sup720 3BXL should have the daughter card MSFC3. You can check this with show module and go the submodules section near the end and see if there is an MSFC entry.

CEF based multilayer switching should be enabled by default.

sh mls rp was fine with flow based multilayer switching (that of SUP1)

Hope to help



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