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uBR7200 multiple wideband interfaces

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mbernardi
uBR7200 multiple wideband interfaces

Hey everyone, I'm just looking for a little input/discussion about something. While testing D3.0 I noticed you can have multiple Wideband interfaces, ex: Wi1/0:0 and Wi1/0:1. Does anyone have any input on what a real world solution for this would be? One of the only solutions I could come up with is using it for lets say IPv6.. Create a "bundle6" interface with all v6 information and force v6 modems to a specifically controlled Wideband interface.

Has anyone deployed multiple Wideband interfaces in production? What what your experience? How can you force modems to use one or the other? Can you think of any good use for more than one Wideband interface?

I appreciate any input!

Thanks!

mbowe
Multiple widebands

You could configure Wi1/0:0 as 8 DS group, and Wi1/0:1 could be an 4 DS group

The modems use the "largest" group that doesnt exceed their number of DS tuners

4x4 modems can't use Wi1/0:0, so they will use Wi1/0:1

8x4 modems could use either interface, but will end up using Wi1/0:0 because that is a "better fit"

mbernardi
Multiple Widebands IPv6?

Thanks! That makes sense. Unfortunately with how our plant is setup I can't use 8DS in production but maybe one day! I did manage to get it up in my lab however.

Have you or anyone ever used this for IPv6? This will be next on my list for testing and wanted to see if there was any gottchas before I get going.

Thanks again!

mbowe
Nothing special about IPv6

The widebands dont have anything to do with IPv6.

To get IPv6 running, you just set it up on your bundle interface. Works fine in recent IOS (unless you need IPv6 netflow traffic accounting, then you are in trouble!)

Capm
You say in recent IOS, how

You say in recent IOS, how recent? And what sort of trouble have you seen?

mbowe
On ubr10k the IPv6 was

On ubr10k the IPv6 was originally done in software (slow). It moved to hardware in 12.2SCE. Might not be an issue for 7200, since everything there is software anyway.

We've been running dual-stack for quite a while now on SCE and SCF, and everything works fine.

We orginally used the CMTS to provide the addressing and DHCP stuff (eg DNS server info). Later switched to "ipv6 dhcp relay" with ISC-DHCP to get prefix delegation stuff fully working.

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