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List: cisco-nsp
Subject: Re: [c-nsp] Enabling IPv6 on 2951 with VRF consumed 240MB of RAM.
From: Jay Nakamura <zeusdadog () gmail ! com>
Date: 2011-01-26 20:18:55
Message-ID: AANLkTi=5zHpGO9k3xFGvnffCV4Q=zaGaNs5G7Nztvq=P () mail ! gmail ! com
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> How exactly did you "enable IPv6"?
So, I did
ipv6 unicast-routing
ipv6 cef
router bgp <as#>
address-family ipv6 vrf core
no synchronization
network xxxxxxxx::/48
neighbor yyyyy::1 remote-as <other as>
neighbor yyyyy::1 shutdown
I think the BGP config is where the RAM use went up, although no peer
is running and taking no routes. The other router does have ipv6
unicast-routing and ipv6 cef and RAM usage didn't change or barely
changed.
> I have no box with 15.0 + BGP + IPv6 right now, so I can't check - but
> for older IOSes, IPv6 has fairly small impact on memory consumption.
>
> Cisco>sh bgp ipv6 su
> 4374 network entries using 581742 bytes of memory
> 38490 path entries using 2771280 bytes of memory
> ...
>
> Cisco>sh proc mem sort
> Total: 39237408, Used: 22215864, Free: 17021544
> PID TTY Allocated Freed Holding Getbufs Retbufs Process
> 91 0 51770188 7991604 10075460 0 0 BGP Router
>
> Cisco>sh mem
> Head Total(b) Used(b) Free(b) Lowest(b) Largest(b)
> Processor 61A948E0 39237408 22217656 17019752 15261448 16350452
>
>
> this is a 4700M with a 12.3-ish IOS, having 6 full IPv6 BGP peers and
> a number of partial IPv6 BGP peers. 64Mb RAM, 17Mb free.
>
> No IPv4 BGP and no VRFs, though.
>
> gert
> --
> USENET is *not* the non-clickable part of WWW!
> //www.muc.de/~gert/
> Gert Doering - Munich, Germany gert@greenie.muc.de
> fax: +49-89-35655025 gert@net.informatik.tu-muenchen.de
>
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