Virtual Private LAN Service
162
FD 100/320Gbps NT and FX NT IHub Services Guide
3HH-11985-AAAA-TQZZA Issue: 13
•
Forwarding Information Base (FIB) management features on a per service level
including:
• Configurable FIB size limit.
• FIB size alarms.
• MAC learning disable.
• User-to-user communication control for services configured on residential (user)
ports.
• IGMP snooping on a per-VLAN basis.
• static IP address based multicast trees
5.3.2.2 v-VPLS SAPs
ISAM supports configuration of SAPs on Ethernet access or hybrid ports. A v-VPLS
uses Ethernet dot1q encapsulated SAPs exclusively, to handle VLAN ID tagged
traffic received on the regular (network) or residential (user) access/hybrid port
defined by the SAP associated with the v-VPLS. See Residential and regular port
usage for more information.
The ISAM supports dot1q encapsulation at network side for v-VPLS. A frame that is
multiple-tagged with the specified VLAN Id as the most exterior tag, will be handled
by the v-VPLS, since the interior VLAN tag is transparent. As such, the v-VPLS
forwards single- and multiple-tagged frames.
The v-VPLS processes untagged non-L2CP frames, by configuring an SAP for the
v-VPLS with a null VLAN ID defined. In this case, untagged non-L2CP traffic is
handled by the v-VPLS, as if it were tagged with the v-VPLS VLAN ID.
Note 1 — Untagged L2CP traffic is handled by the m-VPLS.
Note 2 — When a v-VPLS is created, the virtual port is
automatically associated with the service; no v-VPLS SAP is
required for the virtual port. See “Using virtual ports to extend
the VPRN interface reach” for information about virtual ports.
Note 3 — You cannot configure a v-VPLS SAP with a null VLAN
ID on an LT port (which is never needed in practice).
Note 4 — Although v-VPLS forwards single- and
multiple-tagged frames, the messages generated by the
v-VPLS itself are single tagged. This is the case for instance for
IGMP messages generated by the v-VPLS when acting as
proxy IGMP client. Then if, for instance, a multi-tagged query
message would be received, the answer on this query message
will be single tagged.
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