[c-nsp] Internet BGP autofailover

[Z A H I D]

Can you check whether you are getting the advertisement of your IP pools
from both ISP. pls check from any route server.

On Mon, Feb 13, 2012 at 8:50 PM, Chuck Church <chuckchurch at gmail.com> wrote:

> And to add, has it ever worked?  If you administratively shut one neighbor,
> does the remaining neighbor work correctly eventually?  If one or both ISPs
> aren't routing your traffic, all bets are off.   Is this a lab, seeing as
> how all the IP space is either 1918 or bogus-looking addresses?
>
> Chuck
>
>
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Keegan Holley
> Sent: Monday, February 13, 2012 9:59 AM
> To: alex nyagah
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Internet BGP autofailover
>
> what do you mean by "isn't working".  No routes, traceroute dies, routes
> but
> no traffic, only a subset of the destinations are reachable,etc..
>
> 2012/2/13 alex nyagah <alex.nyagah.k at gmail.com>
>
> > Hi Group,
> > I have the following configs in my router but auto failover between
> > two ISP is not working, can someone please help..
> >
> >
> > interface GigabitEthernet0/1
> >  description Link to ISP_A
> >  ip address 10.10.10.205 255.255.255.252  ip accounting output-packets
> > ip flow ingress  ip nbar protocol-discovery  duplex auto  speed auto
> > no negotiation auto !
> > interface GigabitEthernet0/2
> >  description Connection to ISP_2
> >  ip address 20.20.20.34 255.255.255.252  ip accounting output-packets
> > ip flow ingress  ip nbar protocol-discovery  load-interval 30  duplex
> > auto  speed auto  no negotiation auto !
> > interface GigabitEthernet0/3
> >  description Connection to WALTER LAN
> >  ip address 10.20.30.254 255.255.255.0  ip tcp adjust-mss 1420  duplex
> > auto  speed auto  no negotiation auto !
> > router bgp 6450
> >  bgp log-neighbor-changes
> >  neighbor 20.20.20.33 remote-as 31177
> >  neighbor 20.20.20.33 description ISP_A-BGP  neighbor 20.20.20.33
> > ebgp-multihop 8  neighbor 20.20.20.33 update-source GigabitEthernet0/2
> > neighbor 10.10.10.206 remote-as 9010  neighbor 10.10.10.206
> > description ISP_A-Ke-eBGP  neighbor 10.10.10.206 update-source
> > GigabitEthernet0/1  maximum-paths 2  !
> >  address-family ipv4
> >  neighbor 20.20.20.33 activate
> >  neighbor 20.20.20.33 weight 1000
> >  neighbor 20.20.20.33 prefix-list WALTER-SUBNET out  neighbor
> > 20.20.20.33 route-map ISP_B_IMPORT in  neighbor 10.10.10.206 activate
> > neighbor 10.10.10.206 weight 100  neighbor 10.10.10.206 prefix-list
> > WALTER-SUBNET out  neighbor 10.10.10.206 route-map prepending in
> > maximum-paths 2  no auto-summary  no synchronization  network
> > 10.20.30.0 mask 255.255.255.0  exit-address-family !
> > ip route 10.20.30.0 255.255.255.0 Null0 254 name BGP-Advertisement ip
> > flow-export source GigabitEthernet0/1 ip flow-export version 5
> > origin-as !
> > no ip http server
> > !
> > !
> > !
> > ip prefix-list DEFAULT seq 10 permit 0.0.0.0/0 !
> > ip prefix-list WALTER-SUBNET seq 5 permit 10.20.30.0/24 ip prefix-list
> > WALTER-SUBNET seq 10 deny 0.0.0.0/0 le 32 !
> > route-map ISP_B_IMPORT permit 10
> >  match ip address prefix-list DEFAULT
> > !
> > route-map prepending permit 10
> >  match ip address prefix-list DEFAULT
> >
> > --
> > **
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> >
> >
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-- 
Cheers !

Z a h i D  K h a n
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