SPAN ports.

[johnleeee]

Hi all,

I have basic question to SPAN

conf. When I conf. local SPAN, my destination port(on this port I have analyzer) disconnects. After that, DHCP doesnt function. So where I do error?

conf is....monitor session 1 source interface FastEthernet0/1

and

monitor session 1 destination FastEthernet 0/2

RG

jl

[Martin Parry]

When you configure SPAN, the destination port no longer passes traffic. Instead it mirrors the traffic from the source address. DHCP requests / responses will no longer pass through this port.

Hope this helps

Martin

[amit-singh]

I addition to the post by Martin, You can use the ingress feature to enable the traffic on the destination port.

http://www.cisco.com/univercd/cc/td/doc/product/lan/cat2950/12122ea7/scg/swspan.htm#wp1218090

HTH,Please rate if it does.

-amit singh

[msp1jsbups]

Do you know why I can connect to a SPAN destination port to remote control my portable running sniffer software if I enable ingress forwarding for that monitor session destination port?

This only works with a NIC with enahnced drivers I got from the Sniffer software developers Network General. If I have a portable otherwise connected to the destination port even with ingress enabled I can't connect to it.