5508 WLC Interface Groups

[awatson20]

We have not configured or used interface groups in our wireless deployments, and I am just curious if there are any issues or caveats experienced with using these?  We have a few instances where we have setup a /23 network for a specific wlan.  I  undertsand this increases broadcasts.  Would interface groups be preferred over using a /23 or even maybe a /22 to accomodate addressing?

[Scott Fella · Accepted solution]

By default, the WLC will not forward broadcast.  There are pro's an con's to interface groups... if your doing multicast, that can be an issue unless you specify an multicast vlan.  I have used interface groups because customer standardize on /24, so I would combine a bunch of /24's to create an interface group.  I have customers with /23 and /23 and others with no issues... but I look at it as on the wired side.  You okay with /23 and or /22 on the wired side?

Thanks,

Scott

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[awatson20]

We have only use /23 in a few instances.  No issues currently.  Thanks.

[Scott Fella]

You are good.... /23 isn't bad at all.  I have to deal with customers who have /16's and wireless and wired on the same subnet:(

Thanks,

Scott

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