BGP "show ip bgp summary" output question

Answered Question
Aug 9th, 2010

Dear All,

My name is Michael, I'm working at SkyVision golobal ip connectivity company.

Recently when doing show ip bgp summary i've discovered something new:

<neighbor IP>  4        <neighbor as>      10   21914        1    0  599 00:06:19        1 (SE)

<neighbor IP>  4        <neighbor as>      10   21914        1    0  599 00:06:19        1 (SPE)

<neighbor IP>  4        <neighbor as>      10   21914        1    0  599 00:06:19        1 (PE)

I'd like to know what is the (SE) and (SPE), and (PE) stands for.

Thanks in advance.

I have this problem too.
0 votes
Correct Answer by dwalton about 6 years 2 months ago

The S,P,E output is displayed when there is a route-refresh in progress for that peer.

- the E is displayed if the peer has requested a route-refresh that hasn't been completed yet

- the S is displayed if the refresh for that peer has started

- the P is displayed if BGP is refreshing the neighbor starting at some table version other than zero.  It should normally start from zero so you won't see this displayed but if you have multiple peers that are out of sync and they request route-refresh at the same time then you may see the P displayed for them once they are in sync.  I wouldn't worry to much about when the P is/is not displayed.

Daniel

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jorge.calvo Mon, 08/09/2010 - 04:25

Hello,

Those acronyms belong to the Hierarchy on the Service Provider Devices:

PE --> Provider Edge MPLS router

SPE --> Superstratum PE which is the router that act as Route Reflector and the router which the UPE (Underlying PE or formerly known as CE, Customer Edge) router connects to.

I do not know what the SE router is.

Hope this helps.

Hitesh Vinzoda Mon, 08/09/2010 - 04:38

Is it a Cisco router/switch, if yes .. may i know the platform and IOS..

Regards

Hitesh Vinzoda

Michael Yandulov Tue, 08/24/2010 - 01:18

Peter,

I'm familiar with MPLS

(SPE) and (PE) it could be relevant to that, my concern is about (SE) can't find anywhere what it stands for
.

Thanks in advance

Atif Awan Tue, 08/24/2010 - 01:28

Before everyone starts thinking about it too much, this has nothing to do with MPLS. This probably reflects some changes in code which has introduced some additional states and if possible someone will provide this information over this forum.

Atif

milan.kulik Tue, 08/24/2010 - 01:45

Hi Michael,

could you please provide the whole sh ip bgp summary output including the field headers?

I've always seen the output like

Neighbor        V    AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
*192.168.3.2    4 50000       2       2        0    0    0 00:00:37        0

i.e., nothing following the  State/PfxRcd field.

BR,

Milan

Michael Yandulov Tue, 08/24/2010 - 02:03

Neighbor         V           AS     MsgRcvd    MsgSent   TblVer     InQ OutQ Up/Down  State/PfxRcd

192.168.1.237   4        60000    2139       2355         13683280    0    0         1d11h           4 (SE)

sometime it was (SPE) and (PE) after the prefixes.

And. by the way, after some time it disappeared. I saw it only on one AS, all the rest neighbors and AS never show that.

Correct Answer
dwalton Thu, 09/23/2010 - 07:28

The S,P,E output is displayed when there is a route-refresh in progress for that peer.

- the E is displayed if the peer has requested a route-refresh that hasn't been completed yet

- the S is displayed if the refresh for that peer has started

- the P is displayed if BGP is refreshing the neighbor starting at some table version other than zero.  It should normally start from zero so you won't see this displayed but if you have multiple peers that are out of sync and they request route-refresh at the same time then you may see the P displayed for them once they are in sync.  I wouldn't worry to much about when the P is/is not displayed.

Daniel

Michael Yandulov Thu, 09/23/2010 - 09:53

Thanks Daniel!

Can you please provide link for reading about that, I was looking for a while, but didn't find anything.

Thanks in advance.

dwalton Thu, 09/23/2010 - 11:29

Well, I looked in the IOS source code to figure out what the SPE meant....can't really post that here

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