[c-nsp] Route processor memory at 99% on 720-3bxl

[Mack McBride]

If you can use Selective Route Download, it frees a good bit of space.
We are running BGP with two full tables and we run fairly high mem utilization
but aren't running into the memory leaks that we did on SXJ.


Mack McBride | Senior Network Architect | ViaWest, Inc.
O: 720.891.2502 | C: 303.720.2711 | mack.mcbride at viawest.com | www.viawest.com


-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul
Sent: Thursday, June 23, 2016 2:09 PM
To: chiel; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Route processor memory at 99% on 720-3bxl

The new code allocates a lot more resources per BGP prefix. The only option for a full table is to go back to the SXJ10 or thereabouts code which will free up about 150M of ram due to how it allocates for the BGP database..  You'd think it would be more efficient on the new code or use some sort of compression but it does not.  Can't use the 15.x code for any devices with full BGP, or even cut-down BGP filtering /24's with multiple peers.


On 6/21/2016 6:01 PM, chiel wrote:
> Hi,
>
> We got a 6500 with a 720-3bxl running
> s72033-advipservicesk9-mz.151-2.SY7.bin.
>
> Devices is has to do some basic routing/switching with full BGP.
> - 1x IPv4 full ebgp router with 585172 prefixes and a ibgp with 216827
> prefixes.
> - 1x IPv6 full ebgp with 28013 prefixes and ibgp with 30104 prefixes.
>
> We have already relocated the CEF so tcam can can hold more ipv4
> routes. But the problem the last couple of weeks has been the RP
> memory. At this moment its on 99% utilization  of the max 1GB that the
> 720-3bxl can hold! On short term we can downgrade back to 12.*
> version, or to "ip base" or "ip service" branch, that might give us
> some room to breath. Or are we missing something that could free up
> lots of memory on a 720-3bxl? I heard BGP Soft Reset might free up
> some memory? Is this true and will it be significant?
>
> #show mls cef summary
> Total routes:                                    621171
>     IPv4 unicast routes:                         590424
>         IPv4 non-vrf routes:                     590310
>         IPv4 vrf routes:                         114
>     IPv4 Multicast routes:                       107
>     MPLS routes:                                 0
>     IPv6 unicast routes:                         30637
>         IPv6 non-vrf routes:                     30637
>         IPv6 vrf routes:                         0
>     IPv6 multicast routes:                       3
>     EoM routes:                                  0
>
>
> #show mls cef maximum-routes
> FIB TCAM maximum routes :
> =======================
> Current :-
> -------
>  IPv4 + MPLS         - 832k (default)
>  IPv6                - 90k
>  IP multicast        - 1k
>
>
> #show ip route summary
> IP routing table name is default (0x0) IP routing table maximum-paths
> is 32
> Route Source    Networks    Subnets     Replicates  Overhead Memory
> (bytes)
> connected       0           27          0           1720 4860
> static          1           6           0           648 1260
> ospf 10         4           146         0           9000 27600
>   Intra-area: 13 Inter-area: 80 External-1: 0 External-2: 57
>   NSSA External-1: 0 NSSA External-2: 0
> bgp 16281       178650      411418      0           35404080 106212240
>   External: 537410 Internal: 52658 Local: 0
> internal        6527 23798440
> Total           185182      411597      0           35415448 130044400
>
>
> #show processes memory sorted
> Processor Pool Total:  885604800 Used:  873661740 Free:   11943060
>       I/O Pool Total:   67108864 Used:   21605592 Free:   45503272
>
>  PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
>  648   0  509215580   57367348  508116264          0          0 BGP
> Router
>  380   0  215107608      40228  215035168          0          0 IP RIB
> Update
>    0   0  168613476      12296  152776588          0          0 *Init*
>
>
>
> Chiel
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