[c-nsp] CISCO ME3600X ARP ISSUE
Aaron
aaron1 at gvtc.com
Wed Jul 3 12:30:42 EDT 2013
you mentioned...
> Cisco ME3600X is not responding to Patton ARP request so Patton is
> losing ip connectivity since is thinking that Default Gateway is down.
...but i see in this wireshark sniff "ARP_WS-C2960G-8TC-L.pcapng" frame
number 14 that the cisco (i assume it's the me3600) does in fact arp reply
to the patton...
00 21 d7 cb 69 c1 - sender mac - cisco says i am 46.245.137.1
00 a0 ba 05 ad c3 - target mac - patton - 46.245.137.3
to prove that the cisco me3600 is sending this maybe you could...
sh interface | in bia
look for "0021.d7cb.69c1"
Aaron
-----Original Message-----
From: Nick Hilliard [mailto:nick at foobar.org]
Sent: Wednesday, July 03, 2013 11:18 AM
To: Antonis Vosdoganis
Cc: Aaron; cisco-nsp
Subject: Re: [c-nsp] CISCO ME3600X ARP ISSUE
Can't really tell much from the pcap files:
http://cloudshark.org/captures/ac6ed1c8470a
http://cloudshark.org/captures/fda45ed488b0
The timestamps don't overlap.
If it works and then stops working, that could be an arp/L2 cam timeout.
Make sure that the arp timer on the switch is configured to be lower than
the cam timer on your 2960.
me3600: show interfaces vlan 333 | i ARP
c2960: show mac address-table aging-time
Nick
On 03/07/2013 17:05, Antonis Vosdoganis wrote:
> Sorry if i didn't make it clear. There is ip connectivity when i boot
> up the patton gateway. The problem appears 20 minutes after when
> patton sends the arp request.
>
> Also the traffic from patton is untagged that's why encapsulation
> untagged is applied under service instance.
>
> Patton has ip address 46.245.137.3 255.255.255.248 and static route
> 0.0.0.0
> 0.0.0.0 46.245.137.1
>
> I am not in the office to send you the 2960 configuration but i will
tomorrow.
>
> I am attaching again the traces.
>
>
>
> On Wed, Jul 3, 2013 at 6:15 PM, Aaron <aaron1 at gvtc.com
> <mailto:aaron1 at gvtc.com>> wrote:
>
> As Nick mentioned, given you are untagging on the patton side, since
you
> should be since you are untagged on the me3600 service instance 333...
>
> Go to the " Patton SmartNode 4528 Voip Gateway Router" and check it's
ip
> address, subnet mask and def gw .... make sure they are ...
>
> Ip address - ip address 46.245.137.2 or .3 or .4 or .5 or .6
> Mask - 255.255.255.248
> Def gw - 46.245.137.1
>
> Aaron
>
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net
> <mailto:cisco-nsp-bounces at puck.nether.net>] On Behalf Of Nick
> Hilliard
> Sent: Wednesday, July 03, 2013 9:46 AM
> To: Antonis Vosdoganis
> Cc: cisco-nsp at puck.nether.net <mailto:cisco-nsp at puck.nether.net>
> Subject: Re: [c-nsp] CISCO ME3600X ARP ISSUE
>
> On 03/07/2013 13:30, Antonis Vosdoganis wrote:
> > I am facing a issue with our Metro Ethernet switch. I have directly
> > connected a Patton SmartNode 4528 Voip Gateway Router to the Cisco
> > Switch which is the Default Gateway (46.245.137.1). Patton GW every
20
> > minutes sends an ARP request asking for default gateways mac
address.
> >
> > Cisco ME3600X is not responding to Patton ARP request so Patton is
> > losing ip connectivity since is thinking that Default Gateway is
down.
>
> Hi Antonis,
>
> Your attachments didn't come through. Can you post them on
> http://cloudshark.org/ so that we can take a look?
>
> > Routing Protocol is ISIS. I have made the some tests with a Catalyst
> > 2960G which is responding to Patton ARP request.
>
> ISIS has nothing to do with default gateways.
>
> You haven't provided enough configuration to determine what the
problem is.
> What vlan is the patton device connected to, and what are the port
> configuration settings on the Catalyst 2960G for the ports which
connect to
> the ME3600 and the Patton device.
>
> If the patton device is on vlan 333 and the 2960G-ME3600X link is
> configured
> as a dot1q trunk on the 2960 side, then you need to use this on the
ME3600X
> side:
>
> --
> interface GigabitEthernet0/23
> switchport trunk allowed vlan none
> switchport mode trunk
> service instance 333 ethernet
> encapsulation dot1q 333
> rewrite ingress tag pop 1 symmetric
> bridge-domain 333
>
> interface Vlan333
> [blah]
> --
>
> Nick
>
> >
> >
> >
> > Switch Port configuration
> >
> > interface GigabitEthernet0/23
> >
> > switchport trunk allowed vlan none
> >
> > switchport mode trunk
> >
> > load-interval 30
> >
> > service instance 333 ethernet
> >
> > encapsulation untagged
> >
> > service-policy input CORPORATE_IN_10MB
> >
> > service-policy output CORPORATE_OUT_10MB
> >
> > bridge-domain 333
> >
> >
> >
> > interface Vlan333
> >
> > bandwidth 10000
> >
> > ip address 46.245.137.1 255.255.255.248
> >
> > load-interval 30
> >
> >
> >
> > #show ip protocols
> >
> > *** IP Routing is NSF aware ***
> >
> > Routing Protocol is "isis"
> >
> > Outgoing update filter list for all interfaces is not set
> >
> > Incoming update filter list for all interfaces is not set
> >
> > Redistributing: static, isis
> >
> > Address Summarization:
> >
> > None
> >
> > Maximum path: 4
> >
> > Passive Interface(s):
> >
> > Vlan333
> >
> > Loopback0
> >
> >
> >
> > Cisco ME3600X is running IOS me360x-universalk9-mz.153-1.S1.bin
> >
> > I have attached 2 wireshark traces one from 3600 and one from 2960.
> >
> >
> >
> > Regards
> >
> >
> >
> > Antonis.
> > _______________________________________________
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> >
>
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