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Link Services CoS on J-series Services Routers

Unlike M-series and T-series platforms, J-series Services Routers support per-bundle queuing on link services (ls) interfaces. Link services interfaces for J-series Services Routers behave the same way as link services IQ interfaces (lsq). There are some exceptions, as follows:

Queue 2 is reserved for voice traffic (LFI) on J-series Services Routers, while all other queues perform fragmentation.
On J-series Services Routers link services interfaces (ls), you can configure compressed Real-Time Transport Protocol (CRTP) without needing to configure MLPPP. For more information, see Voice Services Configuration Guidelines.
Traffic from the ls- interface on queue 0, queue 1, and queues 4 through 7 is mapped onto queue 0 of the constituent link.
The queue 0 buffer size percentage on the constituent links should be configured as a sum of the buffer size percentages for the ls- interface queues (queue 0, queue 1, and queues 4 through 7).

For FRF.16 and MLPPP, link services interfaces on the J-series Services Router work the same way as link services IQ interfaces (lsq) on M-series and T-series platforms.

The following is a sample configuration for a link services interface on a J-series Services Router:



interfaces {


ls-0/0/0 {
per-unit-scheduler;


unit 0 {
encapsulation multilink-ppp;
fragment-threshold 128;
interleave-fragments;


family inet {
address 10.0.0.10/24;
}


}


}




fe-0/0/1 {


unit 0 {


family inet {
address 192.1.1.1/24;
}


}


}




se-1/0/0 {
per-unit-scheduler;


serial-options {
clocking-mode dce;
clocking-rate 2.0mhz;
}




unit 0 {


family mlppp {
bundle ls-0/0/0.0;
}


}


}




se-1/0/1 {
per-unit-scheduler;


serial-options {
clocking-mode dce;
clocking-rate 2.0mhz;
}




unit 0 {


family mlppp {
bundle ls-0/0/0.0;
}


}


}


}

For more information about M-series and T-series link services (ls) interfaces, see Link and Multilink Services Configuration Guidelines. For more information about J-series Services Router configuration and examples, see the J-series Services Router Advanced WAN Access Configuration Guide.

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