Use this command to display the IP multicast forwarding cache that was used to program the hardware flow.
| group group | (Optional) Displays information about a specific multicast destination address. |
| source source | (Optional) Displays information about a specific unicast source address. |
| interface | (Optional) Displays mcache information filtered for the inbound interface. |
| verbose | (Optional) Displays a detailed level of information. |
| brief | (Optional) Displays a single line brief level of information. |
| summary | (Optional) Displays the number of entries currently in the cache. |
| statistics | (Optional) Displays multicast cache statistics. |
| -wide | (Optional) Specifies that the display should use up to 132 characters per line if applicable. |
If no optional parameters are specified, detailed information about all source and destination addresses will be displayed. The statistics verbose option uses a standard 80 column format.
All command modes.
An 80 character line can display statistics for up to 4 slots. If your system has more than 4 slots, use the -wide option to allow for the display of slots beyond slot 4 on a single line.
The output of this command shows what multicast routes have actually been programmed into the S- K- and 7100-Series hardware. Although redundant to the show ip mroute display (show ip mroute), it is a useful debugging tool if there are discrepancies between the multicast routing table and the multicast forwarding table.
This example shows a portion of the IP multicast forwarding cache display:
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IP Multicast Cache Table
FLAGS: S - L2 flow, M - MFIB entry, N - Null OIF, T - static
C - CPU Flow (not in HW), A - flow active, X - pending deletion
F - register
Group Source Interface Flags Age
224.1.1.1 110.1.1.10 vlan.0.13 MA 0d 00h:11m:44s
Outgoing Interface List:
vlan.0.1040
230.1.1.1 20.1.1.10 vlan.0.23 MA 0d 00h:10m:35s
Outgoing Interface List:
vlan.0.1040
239.1.1.1 192.168.101.10 vlan.0.1010 MA 0d 00h:11m:49s
Outgoing Interface List:
vlan.0.13
vlan.0.23
vlan.0.1040
3 mcache entries displayed
This example shows to display IP multicast forwarding cache statistics:
System(rw)->show ip mcache statistics IP Multicast Cache Statistics These counters represent IP Multicast packets seen in the soft-path only. Total IP Multicast packets received : 634 IPv4 IP Multicast packets received : 634 IPv6 IP Multicast packets received : 0 Multicast packets dropped due to TTL : 0 Multicast packets dropped due to ACL : 0 Data packets sent up to PIM at DR : 95 Register packets received at RP : 653 Decapsulated register packets transmitted : 1048 System(rw)->
This example shows how to display a verbose level of IP multicast forwarding cache statistics:
System(rw)->show ip mcache statistics verbose IP Multicast Cache Statistics These counters represent IP Multicast packets seen in the soft-path only. Statistic Totals Slot 2 Slot 3 ----------------------------------------------------- Packets in : 634 42 592 v4 Pkts in : 634 42 592 v6 Pkts in : 0 0 0 Drop TTL : 0 0 0 Drop ACL : 0 0 0 Sent to PIM : 95 95 0 Registers recvd : 653 170 483 RP transmits : 1048 1048 0 System(rw)->
This example shows how to display a brief level of multicast forwarding cache statistics:
System(rw)->show ip mcache statistics brief IP Multicast Cache Statistics These counters represent IP Multicast packets seen in the soft-path only. Total IP Multicast packets received : 634 IPv4 IP Multicast packets received : 634 IPv6 IP Multicast packets received : 0 System(rw)->