Solved

High cpu spikes

Posted on 2011-02-11
5
1,054 Views
Last Modified: 2012-05-11

(REMOTE SITE)

Cisco 2960 ; 2 Vlan ; It connects to a Dlink layer 3 and an HP Procurve 2610. During implementation I was not able to configure trunks from switch to switch, so i set the connecting ports as access ports between the switches.
So the procurve has Port1(Vlan1), Port2(Vlan2) ----- Dlink [ Port5(Vlan1), Port6(Vlan2) ]
The cisco also has Port1(Vlan1), Port2(Vlan2) ------ Dlink [ Port7(Vlan1), Port8(Vlan3)
Enabled STP on the dlink and cisco. The dlink and procurve have low cpu (7-8%) and seem to be fine.

- Problem 1 : When i activate stp on the procurve, it hangs up and i cant access it (mgmt ip is on vlan1) (loop ??)
- Problem 2 : average ok, high cpu spikes on the 2960,  high broadcasts; the amount of traffic on that switch does not justify those numbers attached is a screenshot

Anyone has experience with Dlink layer 3 switches, unable to find a  way to specify the encapsulation type; or how to tag the packets with the vlan id properly
interfaces cpu
0
Comment
Question by:Affiliated_IT
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 34

Expert Comment

by:Istvan Kalmar
ID: 34877038
Hi,

I think you made an STP loop!
You need to use same STP type on individual devices!
What type of STp do you use on DLINK, cisco and HP?
0
 
LVL 57

Accepted Solution

by:
giltjr earned 500 total points
ID: 34880403
Problem 1:

Make sure you know what is exactly connected to each port.  Somewhere you must have a loop.  However, it is possible that you have a user with a desktop switch that could have connected it in a way that they created a loop, so you may have to do a "cube" check.  

Can you schedule time to make the necessary changes to that you can use trunks?  Do off the switches support link aggregation?  If so you could setup trunks and do link aggregation which would double the bandwidth between your switches.

Problem 2:  

High CPU spikes every now and then are normal.  Yours really do not look that bad.  I also would not worry about it until you find and get rid of the loop.

Reset the interface counters and see if they still seem to be high.
0
 
LVL 3

Author Comment

by:Affiliated_IT
ID: 34915914
humm...ok I'll try trunking it and see what happens
0
 
LVL 3

Author Comment

by:Affiliated_IT
ID: 34942900
I changed the topology and was able to clear the loop. when i activate lacp (active - passive) the link comes up but i only have access to the vlan interfaces...the access ports do not come through the trunks.
So i disabled it for now...any ideas ?
0
 
LVL 57

Expert Comment

by:giltjr
ID: 34943666
Can you post how the switches are connected now and if possible the configs of each of the switches?
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Changing VLAN information 3 51
HP 2530 switch and routing 4 100
Management of Huawei B315 2 75
Error after upgrade of 3850s 15 95
Hello , This is a short article on how would you go about enabling traceoptions on a Juniper router . Traceoptions are similar to Cisco debug commands but these traceoptions are implemented in Juniper networks router . The following demonstr…
How to set-up an On Demand, IPSec, Site to SIte, VPN from a Draytek Vigor Router to a Cyberoam UTM Appliance. A concise guide to the settings required on both devices
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

752 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question