RE: Troubleshooting for Spanning-tree

From: Ефременко
Date: Thu Apr 28 2005 - 05:00:39 GMT-3

Hello Nizar,
Thirst of all, I recommend use rstp instead stp.
The problem cause may be in a virus worm activity. Sometimes it generates a lot of traffic and overload CPU of a switch.
You also can user following commands to prevent problems.

Cat3550-1(config)#spanning-tree portfast default
Cat3550-1(config)#spanning-tree loopguard default
Cat3550-1(config)#spanning-tree portfast bpdufilter default
Cat3550-1(config)#spanning-tree portfast bpduguard default
!
interface FastEthernet0/22
 switchport mode access
 storm-control broadcast level 7.00
 storm-control action shutdown
 spanning-tree portfast
!
interface FastEthernet0/24
 switchport trunk encapsulation dot1q
 switchport mode trunk
 storm-control broadcast level 10.00
 storm-control action shutdown

and than check if any port in errdisable state. 

---
Best regards,
Alexey Yefremenko 
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of Adminl@kuix.com
Sent: Wednesday, April 27, 2005 12:55 PM
To: ccielab@groupstudy.com
Subject: Troubleshooting for Spanning-tree

Dears, I have 2 questions

Q1:

If I have  alot of edge switches with 2 core 6500,

Some times I facing slow response,some times the reply reaches to 1000ms

I know this is spanning-tree problem,but what the commands which make me
sure Its spanning-tree

I want Just the major commands & which the important lines & parts  I
have to take care?

Q2:

I have Multiple vlans, & I want to assign Multple DHCP for each vlan,How?

For example:

 all users in vlan 1 should take 10.10.10.0/24

all users in vlan 2 should take 10.20.20.0/24

all users in vlan 3 should take 10.30.30.0/24

ETC..

Thanx

Nizar

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