[c-nsp] Unicast flooding on 6500 with dcef

[jack b]

The traffic being flooded to that mac-address is arriving on two layer3
tengig interfaces on module 2. Both interfaces are configured as routed
ports to two different ISP's

Here is the show mod

Mod Ports Card Type                              Model              Serial
No.
--- ----- -------------------------------------- ------------------
-----------
  1   16  Pure SFM-mode 16 port 1000mb GBIC      WS-X6816-GBIC
SAL########
  2    4  CEF720 4 port 10-Gigabit Ethernet      WS-X6704-10GE
SAD########
  3    6  Firewall Module                        WS-SVC-FWM-1
SAD########
  4    6  Firewall Module                        WS-SVC-FWM-1
SAD########
  5   16  Pure SFM-mode 16 port 1000mb GBIC      WS-X6816-GBIC
SAL########
  6    2  Supervisor Engine 720 (Active)         WS-SUP720-3BXL
SAL########
  7   48  CEF720 48 port 1000mb SFP              WS-X6748-SFP
SAL########
  8   16  Pure SFM-mode 16 port 1000mb GBIC      WS-X6816-GBIC
SAL########
  9   48  48 port 10/100/1000mb EtherModule      WS-X6148V-GE-TX
SAL########

Mod MAC addresses                       Hw    Fw           Sw
Status
--- ---------------------------------- ------ ------------ ------------
-------
  1  0012.dafe.d3e8 to 0012.dafe.d3f7   1.7   12.2(14r)S3  12.2(18)SXD7 Ok
  2  001b.d59b.b06c to 001b.d59b.b06f   2.6   12.2(14r)S5  12.2(18)SXD7 Ok
  3  0018.b983.a558 to 0018.b983.a55f   4.0   7.2(1)       2.3(4)11     Ok
  4  0014.a9bc.fa90 to 0014.a9bc.fa97   3.0   7.2(1)       2.3(4)11     Ok
  5  0009.11e0.57f4 to 0009.11e0.5803   1.3   12.2(14r)S3  12.2(18)SXD7 Ok
  6  0015.c69d.e924 to 0015.c69d.e927   4.5   8.4(2)       12.2(18)SXD7 Ok
  7  d0d0.fd62.d5d8 to d0d0.fd62.d607   2.4   12.2(18r)S1  12.2(18)SXD7 Ok
  8  000f.233d.b880 to 000f.233d.b88f   1.7   12.2(14r)S3  12.2(18)SXD7 Ok
  9  0013.c376.88f0 to 0013.c376.891f   1.1   7.2(1)       8.3(0.156)RO Ok

Mod Sub-Module                  Model              Serial        Hw
Status
--- --------------------------- ------------------ ------------ -------
-------
  1 Distributed Forwarding Card WS-F6K-DFC3BXL     SAD########   2.5    Ok
  2 Distributed Forwarding Card WS-F6700-DFC3BXL   SAD########   3.0    Ok
  5 Distributed Forwarding Card WS-F6K-DFC3BXL     SAD########   2.5    Ok
  6 Policy Feature Card 3       WS-F6K-PFC3BXL     SAL########   1.8    Ok
  6 MSFC3 Daughterboard         WS-SUP720          SAD########   2.6    Ok
  7 Distributed Forwarding Card WS-F6700-DFC3BXL   JAF########   5.3    Ok
  8 Distributed Forwarding Card WS-F6K-DFC3BXL     SAD########   2.5    Ok
  9 Cisco Voice Daughter Card   WS-F6K-VPWR-GE     SAL########   1.1    Ok

Mod Online Diag Status
--- -------------------
  1 Pass
  2 Pass
  3 Pass
  4 Pass
  5 Pass
  6 Pass
  7 Pass
  8 Pass
  9 Pass


On Wed, Nov 2, 2011 at 12:44 AM, Phil Mayers <p.mayers at imperial.ac.uk>wrote:

> On 11/02/2011 04:49 AM, jack b wrote:
>
>> I'm having an issue with unicast traffic being flooded on a 6500 with
>> dcef.
>> All the traffic being flooded is to a single mac-address and if i check
>> the
>> cam table for that mac-address I only see an entry on one of the modules
>> with dcef but not on the others. The command 'mac-address-table
>> synchronize' does not seem to be available in the version of code this
>> device is running. Anyone have any idea if there is another way of fixing
>> this without upgrading the code or configuring a static cam entry?
>>
>
> How is the the traffic arriving at the switch? On what port, at what layer
> (layer2 or layer3)? What does "sh mod" say, which will help interpret the
> previous?
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