[j-nsp] Juniper MX240 to Alcatel SAS-M epipe

[Eduardo Barrios]

Tom,

We have a couple of VPLS instances b/t a Juniper M10i and an Alcatel7705. The difference seems to be 14. Unfortunately Alcatel does not have an "ignore-mtu-mismatch" switch. 

We also turn on RSVP mtu path discovery (adspec and flowspec TLVs - records MTUs and reports back the lowest MTU found) on both Juniper and Alcatel, just to make sure our transport pipe will be big enough to handle layer2 vpn service mtu.


## Juniper
ebarrios at XX.re0> show configuration routing-instances VPLS-CDP-1
instance-type vpls;
interface ae0.1;
protocols {
    vpls {
        encapsulation-type ethernet-vlan;
        no-tunnel-services;
        vpls-id 981;
        mtu 2034;
        ignore-mtu-mismatch;
        neighbor x.x.x.x;
    }
}

## Alcatel

        vpls 981 customer 7 create
            service-mtu 2048
            stp
                shutdown
            exit
            sap 1/1/7:1 create
                ingress
                    qos 70
                exit
                egress
                    qos 70
                exit
            exit
            mesh-sdp 3:981 vc-type vlan create
            exit
            no shutdown
        exit

Good Luck,
Eduardo

Eduardo Barrios, EIT, JNCIS-SP
IP/MPLS Telecommunications Specialist
Lower Colorado River Authority  | 3505 Montopolis Dr. |  Austin, TX 78744


-----Original Message-----
From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of Tomasz Mikolajek
Sent: Wednesday, August 07, 2013 4:06 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] Juniper MX240 to Alcatel SAS-M epipe

Hi All
I am triing to configure link between MX240 and SAS-M. I want to terminate
Alcatel epipe on MX. I used l2circuit to do this. I can ping address in the
Internet but not every webpage work. I think the problem is in MTU in
epipe. Alcatel has MTU 1522. How to calculate MTU size for MX? Thanks for
help in advance.

Current configuration:
 show protocols l2circuit
traceoptions {
    file debug-l2circuit size 1m files 5;
}
neighbor 10.250.0.9 {
    interface ge-2/1/9.0 {
        virtual-circuit-id 11;
        ignore-mtu-mismatch;
    }
    interface ge-2/1/1.0 {
        virtual-circuit-id 12;
        mtu 1522;
        ignore-mtu-mismatch;
    }
}
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