show tech-support multicast

Displays debugging information specific to Layer 2 and Layer 3 multicast configurations.
Syntax
show tech-support multicast
Modes

Privileged EXEC mode

Usage Guidelines

This command displays the following debugging information specific to Layer 2 and Layer 3 multicast configurations:

  • Multicast VLAN
  • Multicast table
  • Multicast counters
  • Internet Group Management Protocol (IGMP) group
  • Protocol Independent Multicast (PIM) neighbor
  • IP Multicast routing table

Examples

The show tech-support multicast command output resembles the following example. 

device# show tech-support multicast
==========================================================================
BEGIN : show running-config
CONTEXT : TELNET#1 : CONFIG
TIME STAMP : 01:44:36.149 Pacific Wed Dec 09 2015
HW/SW INFO : ICX7250-24/SPR08040b1
==========================================================================
...
==========================================================================
BEGIN : show ip multicast vlan
CONTEXT : TELNET#1 : MCAST VLAN INFO
TIME STAMP : 01:44:37.536 Pacific Wed Dec 09 2015
HW/SW INFO : ICX7250-24/SPR08040b1
==========================================================================
Multicast VLAN information
--------------------------
Summary of all vlans. Please use "sh ip mu vlan <vlan-id>" for details
Version=2, Intervals: Query=125, Group Age=260, Max Resp=10, Other Qr=255

Replication resource sharing: Enabled.
VL500: dft V2, vlan cfg passive, 0 grp, 0 (*G) cache, rtr ports, 
    router ports: e1/2/1(240) 102.102.102.102, 
VL501: dft V2, vlan cfg passive, 0 grp, 0 (*G) cache, rtr ports, 
    router ports: e2/2/4(200) 100.100.100.100, 
VL502: dft V2, vlan cfg passive, 0 grp, 0 (*G) cache, rtr ports, 
    router ports: e2/2/4(200) 100.100.100.100, 
VL503: dft V2, vlan cfg passive, 0 grp, 0 (*G) cache, rtr ports, 
    router ports: e2/2/4(200) 100.100.100.100, 
VL520 no snoop: no global or local config
VL521 no snoop: no global or local config
VL522 no snoop: no global or local config
VL523 no snoop: no global or local config
VL524 no snoop: no global or local config
==========================================================================
TIME STAMP : 01:44:37.638 Pacific Wed Dec 09 2015
END : show ip multicast vlan
TIME TAKEN : 50747990 ticks (50747990 nsec)
==========================================================================
==========================================================================
BEGIN : show ip multicast group
CONTEXT : TELNET#1 : MCAST GROUP
TIME STAMP : 01:44:37.638 Pacific Wed Dec 09 2015
HW/SW INFO : ICX7250-24/SPR08040b1
==========================================================================
Multicast Group Table information
---------------------------------
VL603 : 100 groups, 100 group-port
      group            p-port      ST     QR     life  mode    source    
1     229.20.10.100    e2/1/14     no     no     220   EX      0         
2     229.20.10.99     e2/1/14     no     no     220   EX      0         
3     229.20.10.98     e2/1/14     no     no     220   EX      0         
4     229.20.10.97     e2/1/14     no     no     220   EX      0         
5     229.20.10.96     e2/1/14     no     no     220   EX      0         
6     229.20.10.95     e2/1/14     no     no     220   EX      0         
7     229.20.10.94     e2/1/14     no     no     220   EX      0         
8     229.20.10.93     e2/1/14     no     no     220   EX      0         
9     229.20.10.92     e2/1/14     no     no     220   EX      0         
10    229.20.10.91     e2/1/14     no     no     220   EX      0         
11    229.20.10.90     e2/1/14     no     no     220   EX      0         
==========================================================================
TIME STAMP : 01:44:38.592 Pacific Wed Dec 09 2015
END : show ip multicast group
TIME TAKEN : 477008236 ticks (477008236 nsec)
==========================================================================
==========================================================================
BEGIN : show ip multicast mcache
CONTEXT : TELNET#1 : MCAST FORWADING CACHE
TIME STAMP : 01:44:38.592 Pacific Wed Dec 09 2015
HW/SW INFO : ICX7250-24/SPR08040b1
==========================================================================
Multicast Cache information
---------------------------
Example: (S G) cnt=: (S G) are the lowest 32 bits, cnt is number of SW processed packets
    OIF: 1/1/22 TR(1/1/32,1/1/33), TR is trunk, 1/1/32 primary, 1/1/33 output
vlan 500, 0 cache
vlan 501, 0 cache
vlan 502, 0 cache
vlan 503, 0 cache
vlan 551, 0 cache
vlan 552, 0 cache
vlan 601, 0 cache
vlan 602, 0 cache
vlan 603, 500 caches. 
1    (* 229.44.14.87) cnt=0
     OIF: tag TR(e1/2/1) 
     age=158s up-time=339s, change=75s ipmc=178 (ref-cnt=1) 
2    (* 229.43.13.11) cnt=0
     OIF: tag TR(e1/2/1) 
...
==========================================================================
BEGIN : sh ip multicast pimsm-snooping
CONTEXT : TELNET#1 : MCAST PIM SM
TIME STAMP : 01:44:40.967 Pacific Wed Dec 09 2015
HW/SW INFO : ICX7250-24/SPR08040b1
==========================================================================
Multicast PIM-SM Snooping
---------------------------------
 OIF Info:
 TR - OIF Belongs to Trunk/LAG, Primary port is displayed
 SG - (s,g) downstream fsm state:
 G - (*,g) downstream fsm state:
     NI : No Info, J : Join, PP : Prune Pending, CLEAN : cleanup in progress
 RPT - (s,g,rpt) downstream fsm state:
     NI : No Info, P : Pruned, PP : Prune Pending, Px : Temp step in (*,G)
     join processing, PPx : Temp State in (*,G) processing, CLEAN : cleanup
     in progress.

==========================================================================
TIME STAMP : 01:44:40.967 Pacific Wed Dec 09 2015
END : sh ip multicast pimsm-snooping
TIME TAKEN : 211008 ticks (211008 nsec)
==========================================================================
(output truncated)
Parent topic: Debug Commands Q - Z