Hello,
we have traditionally used "neighbour x.y.z.w soft-reconfiguration inbound"
for eBGP peers.
Now I (eventually) realise that I might save some memory by using the route
refresh capability.
Questions are:
1.will I actually save memory? is the "soft-reconfiguration
inbound" command ignored if the router supports route-refresh?
2.how do I check that the peer supports route refresh?
3.how do I remove the "soft-reconfiguration inbound"command without
breaking anything?
Thanks in advance,
Vincent
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Vincent De Keyzer wrote:

1.will I actually save memory? is the "soft-reconfiguration
inbound" command ignored if the router supports route-refresh?

Yes, you'll save memory. No, the command is not ignored if route
refresh is supported.

2.how do I check that the peer supports route refresh?

edge1-ifmt#sh ip b n | i refresh
Route refresh: advertised and received(new)
Route refresh: advertised and received(new)
edge1-ifmt#

3.how do I remove the "soft-reconfiguration inbound"command without
breaking anything?

Just do it. You may need to reload to actually save the memory though -
YMMV, but I had to reload to claim it back.

pt

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At 11:26 AM 5/9/2006, Brian Johnson wrote:
--
Message
From: cisco-nsp-bounces (AT) puck (DOT) nether.net
[mailto:cisco-nsp-bounces (AT) puck (DOT) nether.net] Behalf Pete Templin
Sent: Tuesday, May 09, 2006 9:59 AM
To: Vincent De Keyzer; Cisco Nsp
Subject: Re: [c-nsp] Taking advantage of route-refresh

Vincent De Keyzer wrote:

1. will I actually save memory? is the "soft-reconfiguration
inbound" command ignored if the router supports route-refresh?

Yes, you'll save memory. No, the command is not ignored if route
refresh is supported.

2. how do I check that the peer supports route refresh?

edge1-ifmt#sh ip b n | i refresh
Route refresh: advertised and received(new)
Route refresh: advertised and received(new)
edge1-ifmt#

3. how do I remove the "soft-reconfiguration
inbound"command without
breaking anything?

Just do it. You may need to reload to actually save the
memory though -
YMMV, but I had to reload to claim it back.
>
>Mine indicate
>
Route refresh: advertised and received(old & new)
>
>for all of my neighbors, but I have the "soft-reconfiguration inbound"
>configured on all of these neighbors.
>
>If I remove that configuration, what configuration lines do I need to add to
>use the route refresh option? Is it automatic?

It's automatic. To use it:

clear ip bgp nei x.x.x.x in

or

clear ip bgp nei x.x.x.x out

Those commands will tear down the BGP session if route refresh is
supported between the peers.

Vinny Abello
Network Engineer
Server Management
vinny (AT) tellurian (DOT) com
(973)300-9211 x 125
(973)940-6125 (Direct)
PGP Key Fingerprint: 3BC5 9A48 FC78 03D3 82E0 E935 5325 FBCB 0100 977A

Tellurian Networks - The Ultimate Internet Connection
http://www.tellurian.com (888)TELLURIAN

"Courage is resistance to fear, mastery of fear - not absence of
fear" -- Mark Twain

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At 12:38 PM 5/9/2006, Vinny Abello wrote:
>At 11:26 AM 5/9/2006, Brian Johnson wrote:
>
>
Message
From: cisco-nsp-bounces (AT) puck (DOT) nether.net
[mailto:cisco-nsp-bounces (AT) puck (DOT) nether.net] Behalf Pete Templin
Sent: Tuesday, May 09, 2006 9:59 AM
To: Vincent De Keyzer; Cisco Nsp
Subject: Re: [c-nsp] Taking advantage of route-refresh

Vincent De Keyzer wrote:

1. will I actually save memory? is the "soft-reconfiguration
inbound" command ignored if the router supports route-refresh?

Yes, you'll save memory. No, the command is not ignored if route
refresh is supported.

2. how do I check that the peer supports route refresh?

edge1-ifmt#sh ip b n | i refresh
Route refresh: advertised and received(new)
Route refresh: advertised and received(new)
edge1-ifmt#

3. how do I remove the "soft-reconfiguration
inbound"command without
breaking anything?

Just do it. You may need to reload to actually save the
memory though -
YMMV, but I had to reload to claim it back.
>
>Mine indicate
>
Route refresh: advertised and received(old & new)
>
>for all of my neighbors, but I have the "soft-reconfiguration inbound"
>configured on all of these neighbors.
>
>If I remove that configuration, what configuration lines do I need to add to
>use the route refresh option? Is it automatic?
>
>It's automatic. To use it:
>
>clear ip bgp nei x.x.x.x in
>
>or
>
>clear ip bgp nei x.x.x.x out
>
>Those commands will tear down the BGP session if route refresh is
>supported between the peers.

Sorry typing too fast. I meant: Those commands will NT tear down
the BGP session if route refresh is supported between the peers.
Sorry for any confusion.

Vinny Abello
Network Engineer
Server Management
vinny (AT) tellurian (DOT) com
(973)300-9211 x 125
(973)940-6125 (Direct)
PGP Key Fingerprint: 3BC5 9A48 FC78 03D3 82E0 E935 5325 FBCB 0100 977A

Tellurian Networks - The Ultimate Internet Connection
http://www.tellurian.com (888)TELLURIAN

"Courage is resistance to fear, mastery of fear - not absence of
fear" -- Mark Twain

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