About Cisco3750 connect ExtremeSwitch Problem ?

[ted_wen]

Hello All :

I had meet the problem about cisoc3750 connect to

Extreme Switch .

At Begining the link is work fine ! but after 5 min / 10 min , the link dow/up flapping . Then come back again ! even config " No keepalive , speed 100 ,

duplex full " Still the same problem ??

I had replace the Cisco3750 to Cisco2950 , the problem still the same .....

So does anyone could help me what's the problem is ?

[Prashanth Krishnappa]

Can you provide more details such as what IOS you are running on the 3750, the config and sh interface for the interface in question.

What model of extreme switch is it and what is the interface on it configured as?

[raynor]

Ｔhe following IOS　ｖｅｒｓｉｏｎｓ　ｗｅｒｅ　ｔｅｓｔｅｄ．

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c3750-i5-tar.121-19.EA1d.tar

c3750-i5-tar.122-20.SE1.tar

c3750-i5-tar.122-20.SE3.tar　

c3750-i9-tar.121-19.EA1d.tar

Ｊｅｍｉｎ　Ｈｕａｎｇ

[raynor]

The attached file is the config file of the 3750.

The tested modules of Extreme switches include

Extreme Alpine 3804 6.2.1 (Build 27),

Summit 200-24 6.2e.2 (Build 16), and

Summit 24-E2 e2.2.00 (Build 18).

Regards,

Jemin Huang

[Prashanth Krishnappa · Accepted solution]

Which interface connects to the Extreme switch? Can you try hard coding Speed/duplex on both sides? Also configure the following under the interfaces since you are not trunking

3750-B(config-if)#switchport mode access

3750-B(config-if)#switchport nonegotiate

[raynor]

Uplink interface is Fastethernet 1/0/48

[jemin · Accepted solution]

Hi!

It works!

Thank you very much!

Best Regards,

Jemin Huang