[c-nsp] Cisco 7507 RSP4 with 2* Vip2-50

[LJ Wobker]

128MB on a VIP carrying the full table may very well NOT be enough
memory... actual memory consumption depends on quite a few factors and
we've seen it vary widely from customer to customer.  

Some of the considerations:
	- version of IOS (newer code is generally bigger)
	- number external routes (i.e. "global BGP" routes)
	- number of internal routes (many customers have almost as many
	  internal routes as they do external
	- features configured
	- number of interfaces, etc.

Not sure what kind of latitude you have with mucking around, but here are
some questions to think about and/or things to try:

	- do you have other functioning VIPs in this router?  
		Same amount of memory?
	- do you have other functioning VIPs in the network?  
		Same topological view (i.e. same number of routes/peers?)  
		Same amount of memory on these VIPs?
	- if you remove all routes and boot the VIP, how much free memory?
	- what do your forwarding tables look like?  (if-con to the VIP first)
		- show ip cef sum
		- show ip route sum  (on RSP only)
		- show proc mem sorted alloc
		- show region

Hope this helps get you started...

--lj


On Mon Feb 13, 2006 at 11:29:14AM -0500, Jon Lewis wrote:
>On Mon, 13 Feb 2006, Gert Doering wrote:
>
>> On Mon, Feb 13, 2006 at 11:00:54AM -0500, Justin M. Streiner wrote:
>>>> Jan 21 10:59:00: %FIB-3-FIBDISABLE: Fatal error, slot/cpu 1/0: no memory Jan
>>>> 21 10:59:01: %FIB-3-FIBDISABLE: Fatal error, slot/cpu 4/0: no memory Jan 21
>>>> 10:59:03: %IPC-5-SLAVELOG: VIP-SLOT1:
>>>
>>> Are you taking full BGP routes on this router?  If so, I suspect that the
>>> CEF cache is too big to fit in the memory on those VIP2-50s.
>>
>> On our 7500 with 12.0S, the VIP2-50s with 128 Mb have 59 Mb "free".  The
>> "CEF LC IPC Background" process holds 45 Mb, *Init* holds 20 Mb.
>>
>> So even with the much larger IOS footprint in 12.2S, 128 Mb VIP memory
>> should be plenty.
>
>Must be an IOS bug fragging his memory.  12.2(18)S6 on VIP2-50 with 128mb 
>and full routes has 58MB free.
>
>----------------------------------------------------------------------
>  Jon Lewis                   |  I route
>  Senior Network Engineer     |  therefore you are
>  Atlantic Net                |
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Lawrence J. Wobker   "Highly trained network monkey"    lwobker at cisco.com
CCIE #5020         Technical Marketing Engineer, Routing Technology Group
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