[c-nsp] Cisco GSR Chokes on BGP

Oliver Boehmer (oboehmer) oboehmer at cisco.com
Wed May 5 00:58:33 EDT 2010


 
> 
> I have a link in my history, so I am sure that I have seen the issue
but
> do not recall the specifics.
> 
>
http://www.cisco.com/en/US/products/hw/routers/ps359/products_tech_note0
9186
> a0080110d68.shtml#ts3
> 

+1, you might want to enable "ip cef linecard ipc memory 10000" or to
allocate more IPC buffers on the linecard, which speeds up FIB download
to the LCs.. I am assuming you're carrying full routes.
are you running some form of BGP load-sharing on this box (i.e.
maximum-paths 2 or so in BGP)? Haven't dealt with Engine2 in ages, but I
recall there are some limitations to consider.

	oli


> Dominic wrote:
> > Hi Everyone:
> >
> > I am curious: is anyone doing BGP, with Full routes, on a GSR?
> >
> > I am asking because, I have Transit circuit terminated on a 3-Port
GigE
> Line Card, on a GSR 12008 runing PRP-2. Remote peer is sending FULL
BGP
> routes.  As soon as the BGP session comes up, however, the line card
> crashes/resets. Setting the maximum-prefix BGP parameter to a really
low
> level makes no difference.  The LC is configured with the maximum
possible
> MEM available for that device, and this is the only BGP session on the
> entire box.
> >
> >
> > Here is the crashing error I get:
> >
> > May  4 16:40:07 gsr1-BUFF 4361795: May  4 20:40:06.405:
%BGP-5-ADJCHANGE:
> neighbor X.X.X.X  Up
> > May  4 16:40:45 gsr1-BUFF 4361798: May  4 20:40:44.795:
%FIB-2-FIBDISABLE:
> Fatal error, slot 3: IPC Failure: timeout
> > May  4 16:40:45 gsr1-BUFF 4361799: May  4 20:40:44.795:
%RP-4-RSTSLOT:
> Resetting the card in the slot: 3,Event: CEF failure
> > --------------------------------------
> >
> > Here is the show diag from the Line Card:
> >
> > SLOT 3  (RP/LC 3 ): 3 Port Gigabit Ethernet
> >   MAIN: type 68,  800-6376-03 rev C0
> >         Deviation:  D008017
> >         HW config: 0x00    SW key: 00-00-00
> >   PCA:  73-4775-06 rev B0 ver 2
> >         Design Release 2.0  S/N CAB0527JGN1
> >   MBUS: Embedded Agent
> >         Test hist: 0x00    RMA#: 00-00-00    RMA hist: 0x00
> >   DIAG: Test count: 0x05000006    Test results: 0x00000000
> >   FRU:  Linecard/Module: 3GE-GBIC-SC=
> >         Processor Memory: MEM-GRP/LC-256=
> >         Packet Memory: MEM-PKT-512-UPG=
> >   L3 Engine: 2 - Backbone OC48 (2.5 Gbps)
> >   MBUS Agent Software version 2.70 (RAM) (ROM version is 3.67)
> >   ROM Monitor version 19.1
> >   Fabric Downloader version used 11.5 (ROM version is 11.5)
> >   Primary clock is CSC 1
> >   Board is analyzed
> >   Board State is Line Card Enabled (IOS  RUN )
> >   Insertion time: 24w4d (00:28:12 ago)
> >   Processor Memory size: 268435456 bytes
> >   TX Packet Memory size: 268435456 bytes, Packet Memory pagesize:
16384
> bytes
> >   RX Packet Memory size: 268435456 bytes, Packet Memory pagesize:
16384
> bytes
> >   1 crash since restart
> > -------------------------
> >
> > And For the Processor diag:
> >
> > show diags 0
> >
> > SLOT 0  (RP/LC 0 ): Performance Route Processor
> >   MAIN: type 96,  800-23469-02 rev A0
> >         Deviation:  D074404, D074394, D073524
> >         HW config: 0x10    SW key: 00-00-00
> >   PCA:  73-8812-05 rev A0 ver 5
> >         Design Release 0.0  S/N SAD082805A5
> >   MBUS: MBUS Agent (1)  73-8048-06 rev A0 dev 0
> >         HW version 0.1  S/N CAT08180BD7
> >         Test hist: 0x00    RMA#: 00-00-00    RMA hist: 0x00
> >   DIAG: Test count: 0x00000000    Test results: 0x00000000
> >   FRU:  Linecard/Module: PRP-2=
> >         Route Memory: MEM-PRP/LC-3584=
> >   MBUS Agent Software version 2.70 (RAM) (ROM version is 3.68)
> >   ROM Monitor version 1.23(0.36)
> >   Primary clock is CSC 1
> >   Board State is IOS Running  ACTIVE (ACTV  RP )
> >   Insertion time: 00:00:07 (24w4d ago)
> >   DRAM size: 3758096384 bytes
> >   DRAM DIMM Slot 1: 2048M found, Slot 2: 2048M found
> >
> > -------------------
> >
> >
> > Here is the BGP Config:
> >
> > router bgp xxxx
> >  no synchronization
> >  bgp router-id x.x.x.x
> >  no bgp fast-external-fallover
> >  bgp log-neighbor-changes
> >  bgp dampening
> >  network x.x.x.x mask 255.255.254.0
> >  network x.x.x.x mask 255.255.252.0
> >  redistribute static
> >  neighbor x.x.x.x remote-as x.x.x.x
> >  neighbor x.x.x.x description Telco1
> >  neighbor x.x.x.x password 7 xxxxx
> >  neighbor x.x.x.x ebgp-multihop 5
> >  neighbor x.x.x.x version 4
> >  neighbor x.x.x.x route-map BGP-OUTGOING out
> >  neighbor x.x.x.x maximum-prefix 400000 warning-only
> >  no auto-summary
> >
> >
> > Any help would be appreciated.
> > Thanks.
> >
> >
> > Dominic
> > _______________________________________________
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> >
> >
> 
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