Hi Paul.
pauldongso sagte:
> Please advise how STP participates in the following scenario and why STP
> fails to stop the loop?
> --------------------
> |switch A |
> ---------------------
> |(vlan 7) | (vlan 8)
> | |
> | |
> |(vlan 1) |(vlan 1)
> -------------------
> | switch B |
> --------------------
> | | |
> vlan 1 hosts
>
>
> In short, switch A has two ports configured with vlan 7, vlan 8
> respectively. Swtich B all ports are at default vlan 1.
> links between swA and swB are access mode.
>
> This scenario creates bridging loop. But just can't figure out why STP
> fails to stop loop.
This actually creates no loop. The issue you have here is
that all traffic forwarded on VLAN 7 on SW A gets forwarded
to VLAN 8 and vice versa. So you see the MAC addresses on
VLAN 8 also on VLAN 7 which could probably confuse the switch.
It did never occur to me that someone might be doing that,
so I can not tell if this really causes problems. But it's
definately no STP loop (especially with PVST etc.). Why don't
you trunk the Switches properly?
> Thanks in advance.
>
> Paul
best regards,
Oliver
--
Oliver Hensel
telematis Netzwerke GmbH
mailto: [EMAIL PROTECTED]
Siemensstrasse 23, D-76275 Ettlingen
Tel: +49 (0) 7243-3448-0, Fax: -498
visit us: http://telematis.com
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=58228&t=58099
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
