[c-nsp] CISCO ME3600X ARP ISSUE

[Nick Hilliard]

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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