[c-nsp] Packet Lost on interface Loopback

vannara vuth vannara1680 at gmail.com
Sat May 3 03:23:13 EDT 2014


Hi steinar,

I'm also facing the similar issue. What was symtom on your router when
receiving the log message? Packet loss to v4 address on loop back as well?

Regards,
Vannara

On Saturday, May 3, 2014, Rimestad, Steinar <Steinar.Rimestad at altibox.no>
wrote:

> Hi.
>
> We have been hitting the same issues recently and I am sure several other
> people on here has as well. Per default the 76xx with untweaked CEF
> maximum-routes allocation is 512k prefixes for IPv4+MPLS and 256k for
> IPv6+MC. Seeing as the internet routing table just hit 500k prefixes you
> should really consider tweaking the cef maximum-routes.
>
> Default:
>
> PE2#show mls cef maximum-routes
> FIB TCAM maximum routes :
> =======================
> Current :-
> -------
>  IPv4 + MPLS         - 512k (default)
>  IPv6 + IP Multicast - 256k (default)
>
> You have to consider your MPLS+MC+IPv6 needs and re-allocate accordingly,
> we are currently looking to deploy around 700k+ for IPv4 routes as some of
> our 7600 will live on for a few more years before being replaced.
>
> Best Regards,
> Steinar
>
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net <javascript:;>]
> On Behalf Of dol meun
> Sent: 3. mai 2014 05:13
> To: cisco-nsp at puck.nether.net <javascript:;>
> Subject: [c-nsp] Packet Lost on interface Loopback
>
> Dear All,
>
> Has anyone used to meet the problem of packet lost on interface loopback
> for IPv4 and IPv6 is has no problem in Cisco CISCO7606-S. CPU process is
> normal 5% to 10%. but we have found the logging "
> %MLSCEF-SP-4-FIB_EXCEPTION_THRESHOLD: Hardware CEF entry usage is at 95%
> capacity for MPLS protocol." but I am not sure it related to the packet
> lost on the  loopback interface or not. For the ping to the other interface
> in that router it works fine and traffic pass-through that router also fine.
>
> Pleas help if anyone know that root of that problem.
>
> Best Regards,
> Dol
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net <javascript:;>
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
>
>
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net <javascript:;>
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>


-- 
Sent from Gmail Mobile


More information about the cisco-nsp mailing list