MPLS Memory

Unanswered Question
Apr 15th, 2009

Dears :

3750ME - show mpls memory detailed :

please tell me is it has any ploblem ?

xxx#show mpls memory detailed

LFD In-use Asked-For/Allocated Count Size Cfg/Max

----------------------------------------------------------------------------

LFD: AToM pwid : -- 65472/67208 -- 176 512/372

LFD: FIB feature : 45056 65536/73912 1408 32 2340/2048

LFD: LTE : 25408 65536/70000 397 64 512/512

LFD: LT_WALK : -- 360/620 -- 20 16/18

LFD: non-IP info : 432 65448/68144 4 108 630/606

Total : 70896 262352/279884 1809 -- --/--

LSD In-use Asked-For/Allocated Count Size Cfg/Max

----------------------------------------------------------------------------

LSD: intf : 448 32704/33536 2 224 128/146

LSD: label tbl : 58608 65472/71856 1332 44 512/744

LSD: label tbl : 84 1428/1752 1 84 16/17

Total : 59140 99604/107144 1335 -- --/--

MFI In-use Asked-For/Allocated Count Size Cfg/Max

----------------------------------------------------------------------------

MFI: Clnt CMsg : -- 43808/65580 -- 21904 8/2

MFI: Clnt SMsg : 87616 87616/131160 4 21904 4/2

MFI: InfoReq : -- 576/800 -- 144 4/4

MFI: InfoRply : -- 43696/65580 -- 21848 4/2

MFI: vrf table info : -- 756/1024 -- 36 16/21

Total : 87616 176452/264144 4 -- --/--

Total allocated: 0.620 Mb, 635 Kb, 651172 bytes

I have this problem too.
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Giuseppe Larosa Mon, 04/20/2009 - 10:59

Hello Hsin,

everything looks like fine MPLS uses only 635 KB of memory so there shouldn't be any problem of lack of resources.

Hope to help

Giuseppe

Hsin An Chen Tue, 04/21/2009 - 06:23

Thanks .

The 3750ME uses many Route Tag funtions Between OSPF and BGP , so i want to know how many imitation or capability can use in route handsle on 3750ME ?

Giuseppe Larosa Wed, 04/22/2009 - 05:59

Hello Hsin,

route tags are placed in the ad hoc fields of OSPF data structures for external LSAs in the same way there is a route tag for a BGP prefix.

This kind of information has no impact on MPLS because it uses CEF to find the Forwarding Equivalence Classes:

MPLS is interested on the path to use to reach a destination (an IP prefix).

About functionalities you should be able to use route tags for the usual applications:

to manage mutual redistribution on multiple nodes

to decide what to redistribute on another node at another ASBR node.

Are you experiencing any issue with route tags on the C3750 ME ?

Hope to help

Giuseppe

Hsin An Chen Wed, 04/22/2009 - 07:23

Hello

I find the 3750-ME data sheet.

Forwarding rate: 8.55 mpps

Configurable up to 11,000 unicast routes.

if i have 1000 prefixs on BGP and using route tag to redistribute into OPSF .

it will be using how many resource ?

Giuseppe Larosa Wed, 04/22/2009 - 11:31

Hello Hsin,

the most important resource to look at are the TCAM tables that makes the multilayer switch efficient in forwarding.

Regardless of the use of route tags 1000 routes consume 1000 entries in TCAM tables so you should be fine.

Hope to help

Giuseppe

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