Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

  • Congratulations Mike Lewis on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!

Filtered packets

Status
Not open for further replies.

AyrishGrl

Technical User
Feb 14, 2005
129
US
I havea BPS 2000 stack where the trunk ports are filtering a lot of packets. I have done some research on Nortel's site, but all I can find is that this means packets are not being forwarded. Is there any way I can tell why they are being filtered? We are running v. 3.1.4 code. There is only 1 vlan on the switch and no QoS running. Thanks
 
I am guessing that the BPS is uplinked to another switch in the same subnet.

On my 450, if I have two switches in the same subnet, then some traffic is local to just ports on the one switch.

if Switch A sees a MAC address it does not know, it will FLOOD that packet to all ports, until it finds which port it belongs to.

If Switch B does know that that MAC address is not on or beyond Switch B, it will filter it out. (it is sometimes odd that Switch B remembers this when Switch A does not, but the number of addresses each can and are remembering can vary. I often get filtered packets from lesser switches))

I tried to remain child-like, all I acheived was childish.
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top