Reset Search
 

 

Article

How To Troubleshoot Traffic on VSB interconnect Links

« Go Back

Information

 
TitleHow To Troubleshoot Traffic on VSB interconnect Links
Objective
How to Troubleshoot cross connect in VSB
Environment
  • S-Series
  • K-Series
  • 7100-Series
Procedure
RMON can be used to check bonding ports in the same way as any other port. 

->show rmon stat example:
Bonded S8 Chassis(su-config)->show rmon stats tg.4.1

Port: tg.4.1
--------------------
Index = 4001
Owner = monitor
Data Source = ifIndex.43001
Direction = rx+tx

Drop Events = 0 Packets = 198275174
Collisions = 0 Octets = 48460334759
Jabbers = 0 0 - 64 Octets = 242495
Broadcast Pkts = 2572949 65 - 127 Octets = 85591845
Multicast Pkts = 2759610 128 - 255 Octets = 67815268
CRC Errors = 0 256 - 511 Octets = 31124285
Undersize Pkts = 0 512 - 1023 Octets = 5022561
Oversize Pkts = 0 1024 - 1518 Octets = 4083484
Fragments = 0


Run the command twice about thirty seconds apart to see if Dropped  Events, or CRC Errors are increasing.

CRC errors indicate a hardware error on the port or cable.  Swap cable, and then GBICs  one at a time until CRC errors stop

Check the port utilization with show rmon history
How to See the Amount of Bandwidth Traffic on a Port using CLI Output

Enable packet level debug that will be logged.

1.  Configure the number of packets to be logged in the debug
debug packet filter control limit 300

2.  Enable bidirectional packet filter capturing on the bonding port
Bonded S8 Chassis(su-config)->debug packet filter port-in-list tg.4.1 port-out-list tg.4.1

3.  Start the debug
(su-config)->debug packet restart

Use set logging here enable to see the packets real time or use show logging buffer to see the packets.

 Stop the logging (or just let the debug stop when the control packet limit is reached.)
debug packet filter stop (
You will see a lot of traffic like broadcast filtered
Example output
ORIG: InPort(tg.4.1) LEN(88) DA(00:11:88:05:5E:01) SA(00:1F:45:3D:20:C8) C-TAG(8100:0000) ETYPE(7034)
--
BONDING, flow disallowed,
PKT-ORIG: InPort(tg.4.1) LEN(88) DA(00:11:88:05:5E:01) SA(00:1F:45:3D:20:C8) C-TAG(8100:0000) ETYPE(7034)
.
Additional notes

Feedback

 

Was this article helpful?


   

Feedback

Please tell us how we can make this article more useful.

Characters Remaining: 255