[c-nsp] L2VPN between ASR920 and Juniper

Tue Sep 22 14:37:28 EDT 2015

I will check this. Another thing which I should mention is I tested the
case when both sides uses same vlan—id. (On juniper side inner vlan id is
same as 920 side). When both sides use same vlan id, L2VPN is established.
I must mention between 920 and m320 I have gre tunnel with static
routing.When L2VPN is established over GRE no trafic is passed over l2vpn.
I did some deep inspection on this:
Suppose Traffic(Consider normal PING) is sent from CE of m320 to CE of 920:
At start ARP request of CE of m320 is sent to CE of 920. The traffic is
recieved by M320 at is sent over L2VPN over GRE to 920. This router sends
ARP to its CE. This CE gets it and tries to send the ARP reply. BUT At 920
no traffic is sent over L2vpn toward m320.
I checked this scenario while both PEs are 920. When we have GRE in the
middle, no traffic is passed over L2VPN but when GRE is removed, every
thing works fine.
Any idea about this issue?

THANK YOU
Alireza....
On 22 Sep 2015 21:36, "Vinod Kumar Balasubramanyam (vinbalas)" <
vinbalas at cisco.com> wrote:

> I ran into the same thing below. 920 by default negotiates vc type 5.
> Please configure vc type 5 on Juniper and check if the l2vpn establishes.
>
> Thanks,
> Vinod Kumar Balasubramanyam
> ENGINEER.TECHNICAL MARKETING
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> On 9/22/15, 10:09 AM, "cisco-nsp on behalf of Adam Vitkovsky"
> <cisco-nsp-bounces at puck.nether.net on behalf of
> Adam.Vitkovsky at gamma.co.uk> wrote:
>
> >Hi Alireza,
> >
> >This is what I have found :
> >Interoperability between Cisco and Juniper in L2vpn with vc type 4,
> >CSCuq28998
> >
> >Symptom:
> >All VC went down after the IOS upgrade on the router (with the last
> >error: Imposition VLAN rewrite capability mismatch with peer)
> >
> >o Old image: 12.2(33)SRD3
> >o New Image: 15.2(4)S4a
> >
> >Conditions:
> >VC type 4 negotiation
> >
> >Workaround:
> >- configure VC type 5 between the routers (configured on Juniper side)
> >- configuring or using no-control-word command on Juniper router
> >
> >
> >Last Modified:
> >Aug 26,2014
> >
> >Status:
> >Terminated
> >
> >Severity:
> >2 Severe
> >
> >Product:
> >Cisco 7600 Series Routers
> >
> >
> >adam
> >>
> >
> >        Adam Vitkovsky
> >        IP Engineer
> >
> >T:      0333 006 5936
> >E:      Adam.Vitkovsky at gamma.co.uk
> >W:      www.gamma.co.uk
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> >
> >-----Original Message-----
> >> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> >> Alireza Soltanian
> >> Sent: 21 September 2015 13:20
> >> To: cisco-nsp at puck.nether.net
> >> Subject: [c-nsp] L2VPN between ASR920 and Juniper
> >>
> >> Hi Everybody
> >>
> >> When I try to establish L2VPN connection between ASR920 and Juniper
> >> M320, I have this output on ASR920:
> >>
> >>
> >>
> >> ASR920#show mpls l2transport vc detail
> >>
> >> Local interface: Gi0/0/4 up, line protocol up, Eth VLAN 810 up
> >>
> >>   Destination address: 10.234.233.29, VC ID: 2631, VC status: down
> >>
> >>     Last error: Imposition VLAN rewrite capability mismatch with peer
> >>
> >>
> >>
> >> I am using different VLANs on both side:
> >>
> >> ASR920: VLAN 810
> >>
> >> Juniper M320: VLAN 2631
> >>
> >>
> >>
> >> This is configuration on ASR side:
> >>
> >>
> >>
> >> interface GigabitEthernet0/0/4
> >>
> >> no ip address
> >>
> >> media-type auto-select
> >>
> >> negotiation auto
> >>
> >> service instance 1 ethernet
> >>
> >>   encapsulation dot1q 810
> >>
> >>   rewrite ingress tag pop 1 symmetric
> >>
> >>   xconnect 10.234.233.29 2631 encapsulation mpls
> >>
> >>
> >>
> >> this is configuration on Juniper M320
> >>
> >>
> >>
> >> set interfaces xe-1/0/0 unit 2631 encapsulation vlan-ccc
> >>
> >> set interfaces xe-1/0/0 unit 2631 vlan-tags outer 3012
> >>
> >> set interfaces xe-1/0/0 unit 2631 vlan-tags inner 2631
> >>
> >> set interfaces xe-1/0/0 unit 2631 input-vlan-map pop
> >>
> >> set interfaces xe-1/0/0 unit 2631 output-vlan-map push
> >>
> >>
> >>
> >> set protocols l2circuit neighbor 10.241.252.91 interface xe-1/0/0.2631
> >>virtual-
> >> circuit-id 2631
> >>
> >> set protocols l2circuit neighbor 10.241.252.91 interface xe-1/0/0.2631
> >>no-
> >> control-word
> >>
> >> set protocols l2circuit neighbor 10.241.252.91 interface xe-1/0/0.2631
> >>mtu
> >> 1500
> >>
> >>
> >>
> >> Do you have any idea what is the issue?
> >>
> >>
> >>
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