From: Ken.Farrington@barclayscapital.com
Date: Mon Sep 29 2003 - 18:51:59 GMT-3
just for everyones info,
set MULTI_EXIT_DISC does workin with iBGP, i was trying to set it in a
confed and MED does not get compared in confeds by default.
you have to use the command "bgp bestpath med confed" if you want to use fed
within a confederation.
Thx to the dudes at Cisco who sorted this for me :))
-----Original Message-----
From: Ken.Farrington@barclayscapital.com
[mailto:Ken.Farrington@barclayscapital.com]
Sent: 29 September 2003 19:47
To: ccielab@groupstudy.com
Subject: RE: BGP BOLD Statements
Funnily enuff, the SET MED does not work so I can assume that the
MULTI_EXIT_DISC only works on eBGP.
The LOCAL_PREF works a dream :)
-----Original Message-----
From: Ken.Farrington@barclayscapital.com
[mailto:Ken.Farrington@barclayscapital.com]
Sent: 29 September 2003 18:48
To: ccielab@groupstudy.com
Subject: RE: BGP BOLD Statements
actually, I can use both attributes to set the inbound path selection
correct?
ie in the following two BGP examples.
Ethernet
+-------------------------+
| |
rtr1 AS 65001 rtr2
| |
+-------------------------+
Serial
-------------SET-MED---------------------------------
!
router bgp 65001
neighbor 1.1.1.2 remote-as 65001
neighbor 1.1.1.2 route-map SET-MED-ETHERNET out
neighbor 2.2.2.2 remote-as 65001
neighbor 2.2.2.2 route-map SET-MED-ETHERNET out
!
route-map SET-MED-SERIAL permit 10
match as-path 11
set metric 1000
!
route-map SET-MED-SERIAL permit 20
!
!
no route-map SET-MED-ETHERNET
route-map SET-MED-ETHERNET permit 10
match as-path 11
set metric 2000
!
route-map SET-MED-ETHERNET permit 20
or
-------------SET-LOCALPREF---------------------------------
router bgp 65001
neighbor 1.1.1.2 remote-as 65001
neighbor 1.1.1.2 route-map SET-LOCALPREF-ETHERNET out
neighbor 2.2.2.2 remote-as 65001
neighbor 2.2.2.2 route-map SET-LOCALPREF-ETHERNET out
!
route-map SET-LOCALPREF-SERIAL permit 10
match as-path 11
set local-pref 80
!
route-map SET-MED-SERIAL permit 20
!
!
route-map SET-LOCALPREF-ETHERNET permit 10
match as-path 11
set local-pref 90
!
route-map SET-MED-ETHERNET permit 20
!
-----Original Message-----
From: Ken.Farrington@barclayscapital.com
[mailto:Ken.Farrington@barclayscapital.com]
Sent: 29 September 2003 18:24
To: ccielab@groupstudy.com
Subject: BGP BOLD Statements
Hello,
Can I just think of the two BGP attributes LOCAL_PREF and MULTI-EXIT_DISC in
the following way.
LOCAL_PREF = To influence a path to a network outside my AS from my AS ->
outbound path selection
(shared between iBGP peers)
MULTI-EXIT-DISC = To influence to an external AS which path to take coming
to a network in my AS <- inbound path selection
(used "ONLY" with eBGP peers)
Is this about the crucks of it, or it it dangerous to think of these two
attribs this way. Just during my study, my brain is full up and I cant get
too much more in there me thinks.
Many thx indeed.
Ken
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