Use the following commands to check TLV information.
For IP Multicast over Fabric Connect within the GRT, TLV 186 on the BEB where the source is located displays the multicast source and group addresses and have the Tx bit set. Each multicast group has its own unique data I-SID with a value between 16,000,000 to 16,512,000. TLV 144 on the BEB bridge, where the sender is located, has the Tx bit set while on all BEB bridges, where a receiver exists, has the Rx bit set.
Display TLV information:
Switch:1# show isis lsdb tlv 186 detail ================================================================================ ISIS LSDB (DETAIL) ================================================================================ -------------------------------------------------------------------------------- Level-1 LspID: 000c.f803.83df.00-06 SeqNum: 0x000002eb Lifetime: 1113 Chksum: 0x7e3b PDU Length: 556 Host_name: Switch Attributes: IS-Type 1 TLV:186 SPBM IP Multicast: GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.1 Data ISID : 16300012 BVID : 20 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.2 Data ISID : 16300013 BVID : 10 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.3 Data ISID : 16300014 BVID : 20 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.4 Data ISID : 16300015 BVID : 10 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.5 Data ISID : 16300016 BVID : 20 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.6 Data ISID : 16300017 BVID : 10 TX : 1 Route Type : Internal GRT ISID Metric:0 IP Source Address: 192.2.0.10 Group Address : 233.252.0.7 Data ISID : 16300018 BVID : 20 TX : 1 Route Type : Internal