How To Disable IPV6 on Cisco 6500 switch?

[ersin erol]

hi everyone,

  I want to learn that,on cisco switch (2950,3600,6500 series) IpV6 default open? İf It comes open on default,how to disable?

Thanks

[ersin erol]

ıf this problem will be appear again, What can I do for the solution? I did > #default interface vlan 45

[John Blakley]

If it's the same host, disable ipv6 on it. This problem really has nothing to do with your switch.

[ersin erol]

Yeh ı did that.thats a solution but not useful ı think there are too many vlans and users,before problem appearens, can ı do some solutions,May ı use any command?

[John Blakley]

One thing that you should probably look into is storm control. When a switch receives multicast from an unknown source (I'm not sure about a ton of reports and will have to look into that), the switch will treat the traffic like a broadcast. If you have enough of these, it could effectively bring down the switch. With storm control, you can limit the rate at which these types of messages are sent. If it only supports multicast traffic though, like one source sending to hundreds of groups, then it won't help much for your igmp join message. It's still something you should look into.

http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/storm.html

HTH,

John

[gokaygokcay · Accepted solution]

In global config "ip igmp limit 100" will limit number of igmp messages.

Or under interface you can set igmp version 3 so that it wont cause you high cpu usage problem.

"ip igmp version 3"