Link Services Exceptions on J-series Services Routers

The link and multilink services implementation on a J-series Services Router is similar to the implementation on the M-series and T-series routing platforms, with the following exceptions:

• J-series devices support link and multilink services on the ls-0/0/0 interface instead of the ml-fpc/pic/port, lsq-fpc/pic/port, and ls-fpc/pic/port interfaces.
• When LFI is enabled, Queue 2 is reserved for voice traffic, while all other queues perform fragmentation. Also, the queuing behavior on the link services interface and constituent links is different. For more information, see Queuing with LFI on J-series Devices.
• When LFI is enabled, fragmented packets are queued in a round-robin fashion on the constituent links to enable per-packet and per-fragment load balancing. For more information, see Queuing with LFI on J-series Devices.
• J-series devices support per-unit scheduling on all types of constituent links (on all types of interfaces).
• J-series devices support Compressed Real-Time Transport Protocol (CRTP) with MLPPP as well as PPP.
• J-series devices do not support multiclass MLPPP.
• J-series devices do not have the ability to apply fragmentation maps to specific queues to enable LFI on specific queues (a multiclass MLPPP feature).

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