which MSFC install CEF entries under hybrid 6500(SUP2/MSFC2)

Discussion in 'Cisco' started by Tao Liu, Jul 11, 2007.

  1. Tao Liu

    Tao Liu Guest

    6513 SUP2/PFC2/MSFC2 CatOS8.1+IOS12.1

    the two superviors run in highavailability mode,
    but the two MSFCs doesnt(I am not sure: it is not SRM since 16's status is ok,
    it is not manual redundancy mode since both MSFC run in IOS stage)

    1 1 2 1000BaseX Supervisor WS-X6K-S2U-MSFC2 yes ok
    15 1 1 Multilayer Switch Feature WS-F6K-MSFC2 no ok
    2 2 2 1000BaseX Supervisor WS-X6K-S2U-MSFC2 yes standby
    16 2 1 Multilayer Switch Feature WS-F6K-MSFC2 no ok

    In my opinion, 15 is the active module, but I am confused by the CEF table:

    layer2>(enable) show mls cef mac
    Module 15: Physical MAC-Address 00-0c-cf-0f-0f-0c
    Module 16: Physical MAC-Address 00-0c-cf-0f-0f-0d
    Module 16 is the designated MSFC for installing CEF entries

    I think it is Module 15 installed the CEF entries,because:
    `show ip route' under session16 display nothing, and `show ip int brief'
    under session16 says that all interfaces are shutdown. And `show ip cef'
    under session16 is empty too.

    instead, `show ip route', `show ip int brief' and `show ip cef' under
    session15 have correct entries.

    here is CEF table for active supervior in slot 1:
    the skipped entries are all receive entries for VLAN interfaces.
    The problem is that I have default route on session15, however
    it is wildcard in CEF table. I also have many nexthop-ip while
    `show ip cef' under session15, however no correct nexthop-ip
    in CEF table. Is it wired, isnt it? :(

    layer2> (enable) show mls entry cef
    Mod FIB-Type Destination-IP Destination-Mask NextHop-IP Weight
    --- --------- --------------- ---------------- --------------- ------
    16 receive
    16 receive
    15 receive
    15 receive
    16 resolved 1
    16 resolved 1
    15 receive
    15 receive
    15 receive
    15 receive
    15 receive
    15 receive
    15 receive
    16 receive
    16 connected
    16 drop
    16 wildcard

    Mod FIB-Type Dest-IPX-net NextHop-IPX Weight
    --- --------- ------------ ------------------------- ------
    16 wildcard 0

    So I would like someone point me in the right direction.
    what should I do, which command to debug it or syslog etc,
    any idea will be great appreciated, thx
    Tao Liu, Jul 11, 2007
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  2. Tao Liu

    Trendkill Guest

    Shouldn't this all depend on which router is the next hop for which
    networks? Do you have hsrp setup, and if so, which router is active?
    And truthfully, I'm not even sure HSRP matters in this case. Do you
    have adjacencies for your routing protocol? This isn't a cef issue,
    its a layer 2 or 3 issue if you don't have any up/up interfaces in
    show ip int brief. Something is wrong in configuration, as you should
    have all vlan interfaces up, you should see adjacencies in your
    routing protocol, and both routers should have routes to/from the same
    things presuming you have fully redundant configurations. Once that
    stuff is resolved, then you can worry about which msfc is primary and
    will be manipulating CEF. My suspicion is that they both would be,
    but only the one who is the primary for vlans and routing will
    actually be doing it while the other one sits in redundant mode ready
    to takeover in case of a failure.
    Trendkill, Jul 12, 2007
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  3. Tao Liu

    Tao Liu Guest

    I am sure that it is neither SRM(single router mode) nor
    Manual-Mode MSFC Redundancy. I guess it is not Dual MSFC Redundancy,
    no HSRP setup, And I have two questions:
    1, is this correct? -- not configre redundancy for two MSFCs in the
    same chassis.
    2, if it is correct, is it possible `show ip int brief' shows all the
    interfaces are down in session16?

    otherwise, I should configure redundancy for both MSFCs, i.e. DRM, SRM etc
    no routing protocol is running, only static route and default route.
    Tao Liu, Jul 15, 2007
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