E Series routers support the following MLFR features
on the cOCx/STMx and CT3
line modules:
Logical aggregation of up to eight T1 or E1 links in a
bundle
Monotonically increasing sequence numbers for each circuit
All packets distributed across the member links
have monotonically increasing sequence numbers for each circuit. This
feature enables the remote router on the customer premises to perform
resequencing (if it is configured to do so).
Static configuration of the links participating in a multilink
bundle
Round-robin packet distribution
On CT3 line
modules, packet distribution across the member links in a bundle is
handled only in a round-robin fashion. The round-robin approach is
used even when the member links have different line rates.
On cOCx/STMx and COCX-F3 line modules, the router keeps
track of the link with the least traffic. If this link cannot forward
a packet, the router attempts to forward the traffic on a different
link. If this attempt also fails, the router uses a round-robin approach.
You can configure bundles as follows:
On a cOCx/STMx line module and its corresponding I/O modules,
you can configure:
Member links from different OC3/STM1 ports in the same
bundle
The 336 available T1 channels combined in any manner that
does not exceed 8 links per bundle (for example, 336 single-link T1
bundles, 42 eight-link bundles, or 41 eight-link bundles and 8 single-link
bundles)
The 252 available E1 channels combined in any manner that
does not exceed 8 links per bundle (for example, 252 single-link E1
bundles, 34 eight-link bundles, or 33 eight-link bundles and 8 single-link
bundles)
On a COCX-F3 line module and its corresponding I/O modules,
you can configure:
Up to 8 member links from different ports in the same
bundle
Up to 12 bundles
On a CT3 or CT3/T3-F0 line module and its corresponding
I/O module, you can configure:
Only member links from the same T3 interfaces into the
same bundle. You cannot configure member links from different T3 ports
in the same bundle.
The 28 available T1 channels on each port combined in
any manner that does not exceed 8 links per bundle (for example, 28
single-link T1 bundles or 3 eight-link bundles and 4 single-link bundles
per port)
