From: Chris Cole (CCole@EPLUS.com)
Date: Sat Feb 04 2006 - 12:24:10 GMT-3
Yes, I have been messing around with it after my post and I found that
when you unplug or shut down either the LAN or WAN interface. The
convergence times of the host that are using the gateway vary. If a host
is pointing to a gateway that has a failed state on the WAN side it will
converge in like a few pings. If that same gateway has it's LAN side
shutdown, depending on if it is the AVG or not the ping time out vary
greatly. I changed the forward preempt delay to "5". I am running a IGBP
between both routers. This help's when the interface come backup.
Debbie, Thanks for you post.
<----------SNIP--------->
!
track 1 interface FastEthernet0/1 ip routing
!
track 2 interface FastEthernet0/0 ip routing
!
track 3 interface FastEthernet0/1 line-protocol
!
track 4 interface FastEthernet0/0 line-protocol
!
interface FastEthernet0/0
description Connection to Remote LAN Side
ip address 10.10.10.2 255.255.255.0
duplex auto
speed auto
glbp 10 ip 10.10.10.1
glbp 10 timers 1 3
glbp 10 timers redirect 5 605
glbp 10 preempt delay minimum 5
glbp 10 weighting 100 lower 90
glbp 10 weighting track 1 decrement 10
glbp 10 weighting track 2 decrement 10
glbp 10 weighting track 3 decrement 10
glbp 10 weighting track 4 decrement 10
glbp 10 forwarder preempt delay minimum 5
!
!
interface FastEthernet0/1
description Connection to Remote WAN side
ip address 200.1.10.2 255.255.255.0
duplex auto
speed auto
!
router bgp 65020
no synchronization
bgp log-neighbor-changes
network 200.1.10.0
redistribute connected
neighbor 10.10.10.3 remote-as 65020
neighbor 200.1.10.1 remote-as 65001
no auto-summary
!
<---------END-SNIP------------->
-----Original Message-----
From: Debbie Westall [mailto:dwestall@debbie.coxfiber.net]
Sent: Friday, February 03, 2006 10:14 PM
To: Chris Cole
Cc: ccielab@groupstudy.com
Subject: Re: OT GLBP with 2 ISP's
Chris,
Here is a working GLBP config. I have changed the IP addresses to
private
nets for security reasons.
!
These routers are on the same LAN, 2 different ISPs to the Internet,
both
routers running BGP.
!
ROUTER A
interface FastEthernet0/0
description Link to xxx
ip address 192.168.63.1 255.255.255.0
speed 10
half-duplex
glbp 10 ip 192.168.63.254
glbp 10 priority 254
glbp 10 preempt delay minimum 7
glbp 10 weighting 100 lower 95
glbp 10 authentication text xxx10
glbp 10 weighting track 2 decrement 20
glbp 10 forwarder preempt delay minimum 7
!
interface Serial0/0
description Link to xxx
ip address 192.168.1.1 255.255.255.252
no fair-queue
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
router bgp xxx
no synchronization
bgp log-neighbor-changes
network 192.168.63.0
neighbor 192.168.63.2 remote-as xxx
neighbor 192.168.63.2 route-reflector-client
neighbor 192.168.63.2 next-hop-self
neighbor 192.168.63.2 soft-reconfiguration inbound
no auto-summary
!
ROUTER B
interface Fastethernet0/0
ip address 192.168.63.2 255.255.255.0
speed 100
full-duplex
no cdp enable
glbp 10 ip 192.168.63.254
glbp 10 preempt delay minimum 7
glbp 10 weighting 100 lower 95
glbp 10 authentication text xxx10
glbp 10 weighting track 2 decrement 20
glbp 10 forwarder preempt delay minimum 7
!
interface Serial0/0
description xxx T-1 CONNECTION
ip address 192.168.60.206 255.255.255.252
encapsulation ppp
fair-queue 256 256 0
service-module t1 timeslots 1-24
!
router bgp xxx
no synchronization
bgp log-neighbor-changes
network 192.168.63.0
neighbor 192.168.60.205 remote-as xxx
neighbor 192.168.60.205 route-map xxx out
neighbor 192.168.63.1 remote-as xxxx
neighbor 192.168.63.1 soft-reconfiguration inbound
no auto-summary
!
On Tue, 31 Jan 2006, Chris Cole wrote:
> Hello all, has any one used GLBP with two ISP's. I have been looking
for
> an good example, I have not found one yet. If any one has dealt with
> this? I have not used GLBP before so just putting out the feelers.
>
>
>
>
>
> Basically I have a remote site connected to two ISP's it's a MPLS WAN
> for both ISP's.
>
> Remote sites have two routers one for each ISP connection.
>
> Two data centers, each with a connection to both ISP's
>
> The LAN side is a flat segment with no layer 3 switch (I know).
>
>
>
> Thanks for any input.
>
>
>
>
>
> Chris Cole
>
> Senior Network Engineer
>
> CCIE# 10561 R&S
> ePlus Technology, an ePlus Company
> 13595 Dulles Technology Drive
> Herndon, Virginia 20171
> (703) 984-8031 (office)
> (703) 675-3029 (cell)
> ccole@eplus.com <mailto:ccole@eplus.com>
> www.eplus.com <http://www.eplus.com>
>
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