[c-nsp] asr1k looking for advice on packet capturing

[Adam Vitkovsky]

Hi Bryan,

Does the config work when it is service instance specific?
I think the logic is that the main interface itself is not accepting any frames and that it's just the service instances that allow specific frames (as dictated by the encapsulation cmd).


adam
>

        Adam Vitkovsky
        IP Engineer

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-----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Bryan Tabb
> Sent: 04 August 2015 04:45
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] asr1k looking for advice on packet capturing
>
> Hi
>
> Is it possible to use the embedded packet capture to capture traffic that is
> just getting bridged through a service instance?
>
> I've got an ASR1k that gets packets with 3 vlan tags in one interface, 2 tags
> are popped, 1 is pushed and it pops out another interface where the layer 3
> stuff happens.
>
> On the physical interface config looks something like below.
>
> interface GigabitEthernet0/0/3
> mtu 1600
> no ip address
> negotiation auto
> service instance 10 ethernet
>   encapsulation dot1q 10 second-dot1q 20
>   rewrite ingress tag pop 2 symmetric
>   bridge-domain 10
> !
> service instance 11 ethernet
>   encapsulation dot1q 10 second-dot1q 30
>   rewrite ingress tag pop 2 symmetric
>   bridge-domain 11
> !
>
> I've used the EPC before on sub interface and other IP interfaces but when I
> run the below to try and capture just ICMP nothing is captured into the
> buffer.
> The reason for the ICMP filter is there is around 350 Mbps running through
> the physical interface and didn't think it could handle capturing everything.
>
> conf t
> ip access-list ext acl-capture
> permit icmp any any
> exit
> monitor capture mycap access-list acl-capture
> monitor capture mycap buffer size 20
> monitor capture mycap interface GigabitEthernet0/0/3 both
> monitor capture mycap start
>
>
> Any ideas?
>
> Thanks in advance!
>
> Bryan
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