[c-nsp] CISCO ME3600X ARP ISSUE
Antonis Vosdoganis
avosdo at gmail.com
Wed Jul 3 15:39:04 EDT 2013
Yes i have a valid mac address entry.
If i do a shut - no shut on 3600 interface connectivity with patton is
restored.
Στις 3 Ιουλ 2013 10:18 μ.μ., ο χρήστης "Pshem Kowalczyk" <pshem.k at gmail.com>
έγραψε:
> Hi Antonis,
>
> When the loss of connectivity happens - do you still have a valid ARP
> entry on the ME3600 for the Patton?
> If so - what happens if you clear that ARP entry on ME3600 manually
> and then try to ping the Patton?
>
> kind regards
> Pshem
>
>
> On 4 July 2013 04:56, Antonis Vosdoganis <avosdo at gmail.com> wrote:
> > There are 2 traces one from 3600 and one from 2960. The one you are
> > refering is from 2960. With 2960 there is no problem.
> > Στις 3 Ιουλ 2013 7:31 μ.μ., ο χρήστης "Aaron" <aaron1 at gvtc.com> έγραψε:
> >
> >> 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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> >> >
> >> >
> >>
> >>
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