Configuration Guidelines (For 7210 Sas-M) - Alcatel-Lucent 7210 SAS M Service Manual

PBB Features
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Configuration Guidelines (for 7210 SAS-M)

Listed below are the configuration guidelines specific to 7210 SAS-M devices configured in
Network mode:
When "discard-unknown" is enabled on a B-VPLS, the following behavior can be observed:
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traffic that needs to be circulated for two pass processing using the internal loopback.
NOTE: If only PBB Epipe is used (no I-VPLS service is configured for use), then egress
port mirroring can be enabled without affecting PBB traffic, since PBB Epipe traffic does
not use the two-pass approach.
Multiple B-SAPs on the same port cannot be part of the same B-VPLS service. Two B-
SAPs on the same port need to be configured in two different services.
Processing rules for packets received with multiple B-tags on a SAP:
→ If the B-Tag header has two tags, the packet is processed and forwarded appropriately
and sent out of an I-SID service or another B-VPLS B-SAP.
→ If the node is acting as a pure BCB (with no ISID/service termination), then the
packets are flooded and switched appropriately and if the node is acting as a BCB +
BEB, then the packets are flooded and switched appropriately on the B-SAPs, but they
will not switched or flooded to a I-SAPs (both VPLS and Epipe I-SAPs).
PBB I-tag etype is not configurable, it is set to 0x88e7.
PBB B-tag etype is not configurable; it is set to 0x8100.
PBB packets received from a destination MAC address other than the one configured in
the epipe service is not accepted by 7210 devices.
In the current release, PBB packets with UCA bit set are dropped.
Aging of MAC addresses learnt in the B-domain - As long as a Customer MAC (C-MAC)
or an Epipe service is associated with an B-SA/B-MAC, do not age out the B-SA. When
the last customer MAC ages out or the last epipe service using the particular B-SA MAC
is removed, remove the corresponding B-SA entry. This means that as long as an epipe
service is associated with a particular PBB destination MAC address, the corresponding
B-MAC will not age out and will occupy an entry in the L2 learning table. Note, that if
only I-VPLS is in use, then aging out of C-MAC will automatically trigger aging out B-
MAC, when the last C-MAC associated with the B-MAC is aged out.
Unknown unicast (B-DA) packets arriving on a B-SAP are dropped.
Unknown unicast (C-DA) packets arriving on a B-SAP are processed normally in the I-
VPLS, if the B-DA is not unknown unicast.
Unknown unicast (C-DA) packets arriving on an I-SAP are not dropped and are flooded in
the B-VPLS, because B-DA is equal to the "Group Mcast MAC" and is a known value
7210 SAS M Services Guide