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Flapping Problem with 2948G

dingyii
Beginner
Beginner

I set a span port 2/48 to monitor from 2/1 to 2/47 for IDS Sensor require. And the switch have not physical loop. The topology is a server connect to 2948G,and 2948G connect to Netscreen.No HSRP,No FEC. Today, I received a log say:

%SYS-4-P2_WARN: 1/Host 00:30:6e:0c:16:96 is flapping between port 2/2 and port 2/48

%SYS-4-P2_WARN: 1/Host 00:07:ec:17:b3:fc is flapping between port 2/48 and port 2/49.

I feel so strange,because the day before everything is ok.What is the reason will cause this problem?

2 Replies 2

wkumari
Beginner
Beginner

What is on ports 2/2 and 2/49? What are the devices with the MAC addresses 00:30:6e:0c:16:96 (HP something) and 00:07:ec:17:b3:fc (a cisco something)...

Is the IDS plugged directly into port 48? And are there any trunks? Hubs?

SGI server plugged into 2/2 ,2/49 is a uplink to NetScreen and NetScreen connect to Cisco6509. IDS is Plugged directly into Port 2/48 . No any trunks

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