[afnog] CFEB issues on juniper
ibty.jamal at gmail.com
Tue Feb 7 13:10:26 UTC 2012
We had a similar issue on one of the internet routers and the heap
utilization would go up and we kept monitoring and if it got to around 90%
we restarted the router ,as trial and error, upgraded to junos 10.4R5 then
also installed RE-850.
The heap utilization has been at 62% ever since .
It is not clear what solved the issue because we also installed new routers
with RE-850 for internet traffic only and the routes are as below the only
difference is the RE is RE-850..
ISP_VRF.inet.0: 390462 destinations, 780966 routes (390456 active, 0
+ = Active Route, - = Last Active, * = Both
We do not have RE-850 now and we do not have CFEB-e .
I have also noticed this could it be a contributor to the issue
mpls.0: 124645 destinations, 124645 routes (289 active, 124356 holddown, 0
MPLS: 3 routes, 3 active
RSVP: 124635 routes, 279 active
VPN: 7 routes, 7 active
On Tue, Feb 7, 2012 at 1:45 PM, Mark Tinka <mtinka at globaltransit.net> wrote:
> On Tuesday, February 07, 2012 06:24:02 PM ibtisam jamal wrote:
> > @SR01> show chassis cfeb
> > CFEB status:
> > Slot 0 information:
> > State Backup
> > Slot 1 information:
> > State Master
> > Intake temperature 25 degrees C / 77 degrees F
> > Exhaust temperature 31 degrees C / 87 degrees F
> > CPU utilization 56 percent
> > Interrupt utilization 5 percent
> > Heap utilization 84 percent
> Yep, that'll be your problem.
> Your heap utilization is very high, indicating
> that the CFEB is running out of FIB slots, and
> as such, cannot install the routing entries as
> mentioned in the logs.
> Unlike some Cisco devices, the Juniper won't
> fall back to software forwarding, so any traffic
> destined for the routes that couldn't get installed
> in the FIB will be blackholed.
> > @SR01> show chassis hardware
> > Hardware inventory:
> > Item Version Part number Serial number Description
> > Chassis A3583 M10i
> > Midplane REV 06 710-008920 DC0193 M10i Midplane
> > Power Supply 0 Rev 04 740-008985 TA50568 DC Power Supply
> > Power Supply 1 Rev 04 740-008985 TB52654 DC Power Supply
> > HCM 0 REV 04 710-010580 DE0720 M10i HCM
> > HCM 1 REV 04 710-010580 DE0820 M10i HCM
> > Routing Engine 0 REV 12 740-009459 1000672632 RE-5.0
> > CFEB 0 N/A N/A N/A Backup
> > CFEB 1 REV 12 750-010465 AAAT6186 Internet
> > II
> Yep, you also have the standard CFEB's that ship
> with the M7i/M10i. If you want a lot more FIB
> space, you want the Enhanced CFEB, which comes with
> 32MB RLDRAM (as opposed the the standard CFEB which
> ships with only 8MB SSRAM).
> These are your options:
> 1. Maintain the CFEB you currently have but reduce
> the number of routes (inet.0, l2vpn, l3vpn, vpls,
> e.t.c.) that need to be installed in the FIB. Upgrade
> your standard CFEB to 256MB DRAM though (although
> that does not help with FIB exhaustion - that's just
> for packet buffering).
> 2. Maintain the CFEB you have now and reboot the
> router. This is a very short-term fix. If your
> routing remains the way it is now, chances are
> you will run into the same issue again sooner
> than you think. Upgrade your standard CFEB to
> 256MB DRAM (although that does not help with FIB
> exhaustion - those are just for packet buffering).
> 3. Upgrade to the Enhanced CFEB. These days, if
> you're buying new M7i's or M10i's, the Enhanced
> CFEB is the only one that is shipped. Otherwise,
> keeping costs down means pre-owned dealers will
> more often sell you the standard CFEB.
> Operators around the world will be seeing more and
> more of these kinds of problems as the Internet routing
> table continues to explode, and older architectures (like
> the standard M7i/M10i CFEB, older Juniper routers, older
> Cisco 6500/7600 supervisor modules like the SUP720-3B,
> SUP32, SUP2, e.t.c.) keep running the network.
> Hope this helps.
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