can't pass SLP across vlans

[bartlomiej79p]

Hi, I have 3560 switches for some reason I cannot login to NDS while crossing vlans because I cannot browse the tree. I think it has to do something with SLP multicast address not being able to cross the vlans. I am able to browse and log in while I am on the same vlan as the Netware servers. I have no acl configured that would deny this traffic.  I am using flash:c3560-ipbase-mz.122-25.SEB4/c3560-ipbase-mz.122-25.SEB4.bin"

Any help would be appriciated, thanks in advance.

[Reza Sharifi]

Hello bartlomiej,

You have to ebable IGMP on your 2 vlans in order for the SLP to work correctly.

http://support.novell.com/techcenter/articles/ana19990302.html#b12fmgo

HTH

Reza

[darek]

OK, I guess I can do that but I had the switches working properly before without the mlticast turned on. I only added etherchannel between 2 switches that was all I did before this problem occured. What would be the command to enable to multicast?

[Reza Sharifi]

if you rnable ip igmp snooping in global config, it will enable it for all existing vlans or ip igmp snooping vlan 10 enables it only for vlan 10

HTH

reza

[darek]

OK thanks again, do you think this will decrease performance of the network by turining this on? We have a lot of Apple's and they seem to use multicast a lot.

[Reza Sharifi]

No, this will only enable your switches for multicast traffic.

[Pronoy Dasgupta]

Bart,

Couple of things, upgrade the IOS on the switch, and enable "ip pim dense-mode" on the vlan the servers and clients are in (if not already done). Also disable "ip directed-broadcast".

Was this working before by any chance?

Thanks

Pronoy

[bsudol79p]

The SLP worked before on the old IOS, then I had changed to do some changes on the trunk links between the switches. Once I updated the switches to the new IOS and put in the commands you have mentioned it worked. I just don't understand why it was working with the old IOS before the trunking link changes. Thanks for your help!!!!