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Multicast Traffic drop?????

Posted on 2013-06-26
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Last Modified: 2013-07-01
I am losing some of the multicast traffic in/between Router, switch, and DB and would like to know if I am losing them in a router or not.  Also I would like to get some recommendation what kind of switch to buy for multicast traffic.

New#show ver
Cisco IOS Software, 7200 Software (C7200-IS-M), Version 12.4(21), RELEASE SOFTWARE (fc1)

New#show ip multicast int
GigabitEthernet0/1 is up, line protocol is up
  Internet address is 192.
  Multicast routing: enabled
  Multicast switching: fast
  Multicast packets in/out: 1240584686/0
  Multicast TTL threshold: 0
  Multicast Tagswitching: disabled
GigabitEthernet0/3 is up, line protocol is up
  Internet address is 130.
  Multicast routing: enabled
  Multicast switching: fast
  Multicast packets in/out: 0/1214364658
  Multicast TTL threshold: 0
  Multicast Tagswitching: disabled

NewJ#show int
GigabitEthernet0/1 is up, line protocol is up
  Hardware is BCM1250 Internal MAC, address is
  Internet address is 192.
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 2/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is RJ45
  output flow-control is unsupported, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:02, output 00:00:02, output hang never
  Last clearing of "show interface" counters 5d06h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 8850000 bits/sec, 9148 packets/sec
  30 second output rate 1000 bits/sec, 2 packets/sec
     1193938250 packets input, 144284798831 bytes, 0 no buffer
     Received 1193821863 broadcasts, 0 runts, 0 giants, 0 throttles
     1 input errors, 0 CRC, 0 frame, 1 overrun, 0 ignored
     0 watchdog, 1193764917 multicast, 0 pause input
     0 input packets with dribble condition detected
     604306 packets output, 46973124 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     65030 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out


GigabitEthernet0/3 is up, line protocol is up
  Hardware is BCM1250 Internal MAC, address is
  Internet address is
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 2/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is RJ45
  output flow-control is XON, input flow-control is XON
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:44, output 00:00:00, output hang never
  Last clearing of "show interface" counters 5d16h
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  30 second input rate 0 bits/sec, 0 packets/sec
  30 second output rate 8850000 bits/sec, 9148 packets/sec
     126963 packets input, 8818435 bytes, 0 no buffer
     Received 126963 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 133239 multicast, 0 pause input
     0 input packets with dribble condition detected
     1216310273 packets output, 147169195381 bytes, 0 underruns
     0 output errors, 0 collisions, 0 interface resets
     20 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
0
Comment
Question by:JCORION
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9 Comments
 
LVL 29

Expert Comment

by:Jan Springer
ID: 39279301
These interfaces look really clean and what you are receiving is what you are sending.  Is this router configured with pim or igmp?
0
 

Author Comment

by:JCORION
ID: 39279381
it's configured with pim dense-mode

interface GigabitEthernet0/1
 ip address 192.x.x.x 255.x.x.x
 ip pim dense-mode
 load-interval 30
 duplex full
 speed 1000
 media-type rj45
 no negotiation auto


interface GigabitEthernet0/3
 ip address 130.x.x.x 255.x.x.x
 ip pim dense-mode
 load-interval 30
 duplex auto
 speed auto
 media-type rj45
 no negotiation auto
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LVL 29

Expert Comment

by:Jan Springer
ID: 39279409
What does the switch interface show with regard to packets coming from the router/
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Author Comment

by:JCORION
ID: 39279448
it's about 10 years old 3Com switch and it's not accessible from office.  I will be going to the data center tomorrow to check the switch interface.  Do you have a good recommendation for a switch?  I am thinking Cisco Catalyst series so I can manage it from office.

thanks
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LVL 29

Expert Comment

by:Jan Springer
ID: 39279574
Cisco is good.  I also like Brocade's FCX.  The syntax is very cisco-like except that in cisco world, you put the interfface in a vlan and on the fcx you put identify the interfaces under the vlan portion of the config.
0
 

Author Comment

by:JCORION
ID: 39282099
_jesper,

What should I look for in a switch?

KJ
0
 
LVL 29

Expert Comment

by:Jan Springer
ID: 39282147
Your considerations are:

   1) gigabit capable
   2) copper or fiber (or both)
   3) the total number of ports needed
   4) redundancy or spares
   5) managed (this is mandatory for me)
   6) layer 3 (routing) functionality

If budget is an issue, consider purchasing a refurbished (sometimes also new in box).  I prefer Network Hardware.  Their product is reliable.
0
 

Author Comment

by:JCORION
ID: 39282290
Jasper,

Thanks for the recommendation.
I am in data center and what should i check from switch for multicast drop???
I checked all the port status and no drop.

KJ
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LVL 29

Accepted Solution

by:
Jan Springer earned 2000 total points
ID: 39282360
Drops, flushes, retransmissions.

You should check that the amount that you're sending is the same amount as you are receiving into the switch.  Verify CPU and memory in both devices.  Check to see how much real throughput the switch and ports can take.   You may be hitting a ceiling.

And, it would be really helpful if you could SNMP monitor all connected ports (mrtg, cacti or prtg) to get the bandwidth utilization.  Is there a spike that's causing a problem?  Also, is any mcast equipment rebooting and flooding the network?
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