When the Multiple MAC Registration Protocol (MMRP) is enabled in the B-VPLS, it advertises the presence of the I-VPLS instances associated with this B-VPLS.
The following example shows a configuration with MMRP enabled.
*A:PE-B>config>service# info
----------------------------------------------
vpls 11 customer 1 vpn 11 i-vpls create
backbone-vpls 100:11
exit
stp
shutdown
exit
sap 1/5/1:11 create
exit
sap 1/5/1:12 create
exit
no shutdown
exit
vpls 100 customer 1 vpn 100 b-vpls create
service-mtu 2000
stp
shutdown
exit
mrp
flood-time 10
no shutdown
exit
sap 1/5/1:100 create
exit
spoke-sdp 3101:100 create
exit
spoke-sdp 3201:100 create
exit
no shutdown
exit
----------------------------------------------
*A:PE-B>config>service#
Because I-VPLS 11 is associated with B-VPLS 100, MMRP advertises the group B-MAC 01:1e:83:00:00:0b) associated with I-VPLS 11 through a declaration on all the B-SAPs and B-SDPs. If the remote node also declares an I-VPLS 11 associated with its B-VPLS 10, then this results in a registration for the group B-MAC. This also creates the MMRP multicast tree (MFIB entries). In this case, sdp 3201:100 is connected to a remote node that declares the group B-MAC.
The following show commands display the current MMRP information for this scenario:
*A:PE-C# show service id 100 mrp
-------------------------------------------------------------------------------
MRP Information
-------------------------------------------------------------------------------
Admin State : Up Failed Register Cnt: 0
Max Attributes : 1023 Attribute Count : 1
Attr High Watermark: 95% Attr Low Watermark : 90%
Flood Time : 10
-------------------------------------------------------------------------------
*A:PE-C# show service id 100 mmrp mac
-------------------------------------------------------------------------------
SAP/SDP MAC Address Registered Declared
-------------------------------------------------------------------------------
sap:1/5/1:100 01:1e:83:00:00:0b No Yes
sdp:3101:100 01:1e:83:00:00:0b No Yes
sdp:3201:100 01:1e:83:00:00:0b Yes Yes
-------------------------------------------------------------------------------
*A:PE-C# show service id 100 sdp 3201:100 mrp
-------------------------------------------------------------------------------
Sdp Id 3201:100 MRP Information
-------------------------------------------------------------------------------
Join Time : 0.2 secs Leave Time : 3.0 secs
Leave All Time : 10.0 secs Periodic Time : 1.0 secs
Periodic Enabled : false
Rx Pdus : 7 Tx Pdus : 23
Dropped Pdus : 0
Rx New Event : 0 Rx Join-In Event : 6
Rx In Event : 0 Rx Join Empty Evt : 1
Rx Empty Event : 0 Rx Leave Event : 0
Tx New Event : 0 Tx Join-In Event : 4
Tx In Event : 0 Tx Join Empty Evt : 19
Tx Empty Event : 0 Tx Leave Event : 0
-------------------------------------------------------------------------------
SDP MMRP Information
-------------------------------------------------------------------------------
MAC Address Registered Declared
-------------------------------------------------------------------------------
01:1e:83:00:00:0b Yes Yes
-------------------------------------------------------------------------------
Number of MACs=1 Registered=1 Declared=1
-------------------------------------------------------------------------------
*A:PE-C#
*A:PE-C# show service id 100 mfib
===============================================================================
Multicast FIB, Service 100
===============================================================================
Source Address Group Address Sap/Sdp Id Svc Id Fwd/Blk
-------------------------------------------------------------------------------
* 01:1E:83:00:00:0B sdp:3201:100 Local Fwd
-------------------------------------------------------------------------------
Number of entries: 1
===============================================================================
*A:PE-C#