[nsp] atm map-list command

[Scott Morris]

The map-list (or pvc setup) should lock that Ip to the pvc.  When you do
a 'show atm map', where are you seeing the IP's and how are they learned
(dynamic or static)? 

Default operation in ATM is to NOT to inverse ARP, but you could turn it
on, in which case you'd learn things automagically.

Without seeing any more of your config, I can't offer any other
insights. :)

Scott



-----Original Message-----
From: Charles Sprickman [mailto:spork at inch.com] 
Sent: Saturday, March 29, 2003 4:40 PM
To: Scott Morris
Cc: cisco-nsp at puck.nether.net
Subject: RE: [nsp] atm map-list command


On Sat, 29 Mar 2003, Scott Morris wrote:

> Actually, your subinterface has a 'map-group foo' command on it. 
> Separate in your config, you have the 'map-list foo' with the 
> statements that you indicate.

Yes, that is correct.

> But you are correct that the list would indicate the IP address of the

> other side.  Very similar to the way that 'frame-relay map ip' 
> statements map the other side's reachable IP to a DLCI.

What the big question is, is does this actually do anything.  I know if
I leave the map-list out, everything still works.  But the previous
admin was under the impression this would "lock" an IP to a pvc.  From
what I'm seeing, this is not correct.

> If you don't want to use the map-lists, you can map individual pvc's 
> in the "new" method.
>
> Interface atm2/0/1.101
>  pvc 4/40
>   encapsulation aal5snap
>   protocol ip 192.168.0.2 broadcast
>  pvc 4/41
>   encapsulation aal5snap
>   protocol ip 192.168.0.3 broadcast

Nifty.  Thanks for the tip!

C

> Etc.
>
>
> Scott Morris, MCSE, CCDP, CCIE³ (R&S/ISP-Dial/Security) #4713, 
> CCNA-WAN Switching, Security Specialist, Cable Communications 
> Specialist, IP Telephony Support Specialist, IP Telephony Design 
> Specialist, CISSP CCSI #21903 swm at emanon.com
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net 
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Charles 
> Sprickman
> Sent: Saturday, March 29, 2003 4:20 AM
> To: cisco-nsp at puck.nether.net
> Subject: [nsp] atm map-list command
>
>
> Hi,
>
> While I've not been able to track it down in the 12.2 config/command 
> references (had to resort to outside sources), I'm wondering if my 
> idea of what this does is correct.
>
> In the following example, there are a group of adsl customers coming 
> in one per pvc on an atm subinterface.  They all have 
> manually-assigned static IPs, and the subinterface has a "map-list 
> foo" statement on it, with map list "foo" looking like:
>
> ip 192.168.0.2 atm-vc 102 broadcast
> ip 192.168.0.3 atm-vc 103 broadcast
> etc.
>
> This implies that I'm "locking" an IP to a particular PVC, but absent 
> the docs (which oddly only list this as a frame relay command for 
> 12.2), I'm not positive this is actually doing anything.
>
> Can anyone clarify this issue?
>
> We will, as time permits, be moving all adsl customers to RBE, and I 
> assume that at that point this will all be moot.
>
> Thanks,
>
> Charles
>
> --
> Charles Sprickman
> spork at inch.com
>
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