saber1 join:2002-12-18 Hobart, IN |
saber1
Member
2003-Dec-17 2:57 pm
[HELP] cisco 2900 and Bootp requestsI have a large switched network using Cisco 2900 switches. I put a network analyzer on the network and noticed a lot of Bootp requests from all of my switches. These switches have been up for a long time and are not being restarted. Why would these switches be broadcasting Bootp requests? |
|
|
Hmmm... a bit sparse on the background!
1.) Are your switches having an IP address dynamically assigned by a server?
2.) Just to confirm, these are REQUESTS, right?
3.) Can you post a config. of one of them please? |
|
|
dpocoroba Premium Member join:2000-11-14 224.0.0.5 |
to saber1
Do any of them have ip helper configured? |
|
clk join:2003-12-15 Greenville, SC |
to saber1
Post a 'show version' and 'show running-config'. I believe the problem is can be solved by doing a 'no service config'. The switches are looking for their boot config. Turning this off will quiet them down. |
|
MrTwister6 Premium Member join:2003-09-27 Hilliard, OH |
to saber1
unless you set an IP address on the switch, they will go nuts doing bootp requests. Dont forget there are three interfaces in the switch, sc0, sl0, and the last one I always forget. We use only sc0 in our network configurations, and administratively down the other two.
If you do use bootp to allocate the IP addressess be sure to use the ip helper-address on the interface(s) of the router/RSM/MFSC.
We centrally manage a statewide network with two cisco network registrar boxes, without the ip helper-address this wouldnt be possible. Also if you use secondary addressing on router interfaces, the bootp request will come from the primary network address, if that ip scope doesnt exists, no ip will be issued. |
|