[c-nsp] ME3600X Embedded Packet Capture

Ivan cisco-nsp at itpro.co.nz
Fri Aug 10 18:32:59 EDT 2012

Hi Waris,

When troubleshooting a layer 2 service checking what mac addresses can 
seen seen from the customer has been very useful.  Previously with a 
switched access we could look at the mac addresses on the access 
switch.  With MPLS to the edge I haven't found anyway to be able to 
verify customer mac addresses.  I was hopeful EPC may have been an 
option after looking at the release notes I previously referenced.

Using a ME3600X for MPLS to the edge a layer 2 handoff may look 
something like the following

interface GigabitEthernet0/1
  description Customer A
  switchport mode trunk
  mtu 9216
  load-interval 30
  no cdp enable
  service instance 666 ethernet
   encapsulation dot1q 666
   rewrite ingress tag pop 1 symmetric
   xconnect 666 encapsulation mpls

With a switched access there would be similar config as the above on the 
PE but a switch (ACCESS) with vlan 666 between the PE and the customer.  
Checking what mac addresses are seen from the customer is as easy as 
"show mac address-table dynamic vlan 666" or "show mac address-table 
dynamic interface GigabitEthernet 0/1"

With MPLS to the edge it is great the provider doesn't have to worry 
about keeping mac address tables etc - much more scalable, but it would 
be handy if there was an easy way to "peek" to help with 
troubleshooting, as it generally indicates if the problem lies with the 
customer or provider.



On 11/Aug/2012 3:53 a.m., Waris Sagheer (waris) wrote:
> Hi Ivan,
> How do you want to verify the mac address? Can you send me configuration example on access layer switch?
> Also, what is the current configuration on ME3600X?
> Regards,
> Waris
> -----Original Message-----
> From: Ivan [mailto:cisco-nsp at itpro.co.nz]
> Sent: Friday, August 10, 2012 3:27 AM
> To: Waris Sagheer (waris)
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] ME3600X Embedded Packet Capture
> Hi Waris,
> I had come across that bug referring to EPC in "Release Notes for the Cisco ME 3800X and ME 3600X Switch" - http://www.cisco.com/en/US/docs/switches/metro/me3600x_3800x/software/release/15.1_2_ey/release/notes/ol25360.html
> and had hoped that the feature was available.  I wasn't able to find any other documentation thus my question to the list.
> What I am really looking for is a possible way to verify any seen mac addresses on a customer EVC xconnect when running MPLS to the edge for troubleshooting.  This was quite easy and useful with a switched access layer.  I don't really want to xconnect on vlans and bridge to EVCs (not sure that is possible on the ME3600X platform)
> Thanks
> Ivan
> On 10/Aug/2012 8:09 p.m., Waris Sagheer (waris) wrote:
>> Ivan,
>> Which packet capture you are referring to on ME3600X?
>> There is no support of embedded packet capture on ME3600X.
>> Regards,
>> Waris
>> -----Original Message-----
>> From: cisco-nsp-bounces at puck.nether.net
>> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Ivan
>> Sent: Thursday, August 09, 2012 10:35 PM
>> To: cisco-nsp at puck.nether.net
>> Subject: [c-nsp] ME3600X Embedded Packet Capture
>> Hi,
>> Has anyone used Embedded Packet Capture on the ME3600X successfully?  If so are their any gotchas to be weary of?
>> The only things that come up when I search for this is CSCtq11526 Embedded Packet Capture stops BFD neighbor adjacency, but have been unable to find details of what packets can be captured  - hardware v cpu etc.  Any documentation pointers would be appreciated.
>> Thanks
>> Ivan
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