traffic from etherchannel on 6500 seen on access ports

Answered Question
Mar 12th, 2010
User Badges:

Hi,

there is a server with 2 or 4 interfaces grouped in teaming, connected to 6500 switch ports in etherchannel, using trunk with 2 VLANs allowed (eg. 20 & 40)

On the other port a PC connected to access port in one of these VLANs sees a lo of the unicast traffic sourced from and destined to the server connected to etherchannel ports.

How can it be controlled?

Regards,

k

Correct Answer by Giuseppe Larosa about 7 years 4 months ago

Hello Kpandric,


if the server is sending traffic to a destination MAC address that is not speaking the switches flood the frames on every port on that vlan (unicast flooding)


you should check if the destination MAC address(es) of server traffic are in the CAM table or not.


Hope to help

Giuseppe

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
Giuseppe Larosa Fri, 03/12/2010 - 03:13
User Badges:
  • Super Silver, 17500 points or more
  • Hall of Fame,

    Founding Member

Hello Kpandric,


if the server is sending traffic to a destination MAC address that is not speaking the switches flood the frames on every port on that vlan (unicast flooding)


you should check if the destination MAC address(es) of server traffic are in the CAM table or not.


Hope to help

Giuseppe

kpanduric Fri, 03/12/2010 - 05:42
User Badges:

Hi giuslar,

good point, in ARP table I see


6509#show arp | inc f091
Internet  10.10.240.145         122   02bf.0a0a.f091  ARPA   Vlan240


however, there is similar but not exactly the same MAC address on the etherchannel interface:


6509#sh mac-address-table | inc f091
*  240  0202.0a0a.f091   dynamic  Yes          0   Po1
*  240  0201.0a0a.f091   dynamic  Yes          0   Po1


thanks

k

Actions

This Discussion

Related Content