Routing

Probably a stupid question, but if I have an Ethernet-to-Ethernet or TDM-to-Ethernet P2P L2VPN, is there a way to classify the layer 3 traffic contained within it and schedule/queue based upon that traffic?  For instance, customer is running some voice across their L2VPN and they want to give strict priority to that traffic - is that possible?  My feeling is that it's not, because all the scheduling and queuing would be done on their equipment only.

Hello there,

One can classify based on L3/L4 information only in "family vpls|bridge" filters, on VPLS|bridge interfaces.

On L2VPN interfaces (which have family ccc or tcc configured) one can classify on 802.1p bits only if 802.1q encapsulation is used.

HTH

Regards

Alex

Hi,

I have a similar scenario and wondering whether CoS classifier is being applied to L2VPN family ccc interface.

Below is my config:

ge-3/3/8 {
encapsulation ethernet-ccc;
unit 0 {
family ccc {
filter {
input COS_VIDEO_INPUT;
}
}
}
}

> show configuration firewall family ccc filter COS_VIDEO_INPUT
term SET-COS-VIDEO {
then {
count COS-VIDEO;
forwarding-class VIDEO;
accept;
}
}

> show configuration class-of-service classifiers ieee-802.1 BA_Edge_802.1p
forwarding-class VIDEO {
loss-priority low code-points 100;
}

Your help would be much appreciated.

Also, how can I prioritise that ingress traffic over the network if am unable to classify the family ccc L2VPN ingress.

Hello,

You ingress CCC interface appears untagged and 802.1p COS bits exist only in tagged frames.

HTH

Thanks

Alex

Hi Alex,

Thank you for the reponse. That makes sense.

Is there any way to classify traffic from an untagged ccc interface.

Have been researching and found out that BA DSCP Classifiers can be applied on ccc interface on certain MPCs:

"Support for DSCP classification on customer edge links for CCC, TCC, and VPLS (MX Series routers with MPC/MIC interfaces)—Extends support for DSCP-based behavior aggregate (BA) classification for circuit cross-connect (CCC), translational cross-connect (TCC), and virtual private LAN service (VPLS) on MX Series routers with MPC/MIC interfaces.

DSCP-based services provide support for a uniform end-to-end quality-of-service (QoS) model. By using the DSCP classifier, you can apply the QoS configuration for the CCC, TCC, and VPLS families at the IP level. Therefore, you do not have to depend on the underlying Layer 2 QoS support."

http://www.juniper.net/techpubs/en_US/junos11.4/information-products/topic-collections/release-notes/11.4/index.html?topic-62949.html#jd0e3519

Any ideas..

Thanks for your help.

Cheers

Ashvin

Hello,

Yes You can apply the DSCP classifier to CCC ingress interface, if You have MX with Trio cards (or MX5/10/40/80/104 for that matter), Your JUNOS version is 11.4 or newer and Your traffic ingressing this interface is IP. 

HTH

Thanks

Alex

Hi Alex,

Thanks for the help.

Finally got it working with a fixed classifier:

> show configuration class-of-service interfaces ge-3/3/8
unit * {
forwarding-class VIDEO;
}

Cheers,

Ashvin