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New Member

how to make response time of switch faster?

on 3750, when

1. execute ping -t command from a PC to the switch interface vlan 1 ip address,

2. unplug the cable and plug it again,

it takes about 30 seconds to start pinging again.

i disabled the STP protocol and observed that; with the same procedure, recovering ping replies decreased to 3 seconds.

is there any other tuning that i can configure and make response time even faster?

thank you for helping :)

1 ACCEPTED SOLUTION

Accepted Solutions
Cisco Employee

Re: how to make response time of switch faster?

Hi,

Here's a "public" version of the same document that does not require a CCO login. I don't see any actual differences in the two versions of the documents.

http://www.cisco.com/warp/public/473/12.html

HTH,

Bobby

5 REPLIES
Cisco Employee

Re: how to make response time of switch faster?

Hi,

STP convergence is typically the biggest part of host connection delays. Rather than disabling STP, you can configure "spanning-tree portfast" on the port which will achieve the same end.

Beyond that, some of the response time delays are going to be part of MAC address learning, ARP, and the fact that the switch places a low priority on processing ICMP packets. A better test is to ping from another device _through_ the switch rather than to or from the switch.

Here's a good document that covers various commands you can use to mitigate connectivity delays.

Using PortFast and Other Commands to Fix Workstation Startup Connectivity Delays

http://www.cisco.com/warp/customer/473/12.html

HTH,

Bobby

New Member

Re: how to make response time of switch faster?

thanks for fast response Bobby. it helped:)

New Member

Re: how to make response time of switch faster?

hi Bobby,

http://www.cisco.com/warp/customer/473/12.html

Bobby, I can not get in to the address you provided above. my guest password doesnt allow me to get in there :(

althought your explanation was helpful, I am interested in reading the article you recommended.

if this knowledge is not a kind of secret for cisco, could you please send this text to my mail?

serenesetup@gmail.com

thank you

Cisco Employee

Re: how to make response time of switch faster?

Hi,

Here's a "public" version of the same document that does not require a CCO login. I don't see any actual differences in the two versions of the documents.

http://www.cisco.com/warp/public/473/12.html

HTH,

Bobby

New Member

Re: how to make response time of switch faster?

thats just what i was looking for.

tx a lot bobby

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