Re: BGP for address-family ipv6 issue

Gaurav

I have tested and works, the problem i think is that in your R5 router
configuration since you have not used *no bgp default ipv4 unicast* and you
have activated IPV4 under IPV6 address family which is right R5 router
trying to use Global ipv4 BGP config to negotiate capability obliviously
there are 2 different capability and it will not form neighbor

Try using no BGP default IPV4 unicast , if you still face problem please
send us the debug

Thansk and regards
Sakthivel , CCIE # 7675 (R&S and SP V3)

On Fri, Jan 20, 2012 at 12:01 AM, Brian McGahan <bmcgahan_at_ine.com> wrote:

> Post your "debug ip bgp". This will show what the error is during the
> capabilities exchange.
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security)
> bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
> From: GAURAV MADAN [mailto:gauravmadan1177_at_gmail.com]
> Sent: Thursday, January 19, 2012 12:01 PM
> To: Brian McGahan
> Cc: Cisco certification
> Subject: Re: BGP for address-family ipv6 issue
>
> I think this is i did Brian ..
>
> Forget next-hop for BGP learned routes .. my PE-CE session is giving
> following
> error :
>
> *Jan 18 22:51:34.291: %BGP-3-NOTIFICATION: received from neighbor 40.0.0.1
> active 2/8 (no supported AFI/SAFI) 3 bytes 000101 (timer expired)
>
> What address-family is mismatched ..
>
> My configs are in earlier email ..
>
> Thnx
> Gaurav MAdan
> On Thu, Jan 19, 2012 at 11:26 PM, Brian McGahan
> <bmcgahan_at_ine.com<mailto:bmcgahan_at_ine.com>> wrote:
> If you use IPv4 as the transport you need to manually set the next-hop of
> the
> BGP learned routes to an IPv6 address. Here is an example config from my
> CCIE
> SPv3 Advanced Technologies Class. The topology is:
>
> R1--R2---MPLS---XR1--XR2
>
> R1 and XR2 are the CEs, R2 and XR1 are the PEs running 6VPE. Note that on
> IOS
> XR you don't need to change the next-hop to IPv6, it fixes this
> automatically.
>
> R1:
> ip cef
> ipv6 unicast-routing
> ipv6 cef
> !
> interface Loopback0
> ip address 10.1.1.1 255.255.255.255
> ipv6 address 2001:10:1:1::1/128
> !
> interface FastEthernet0/0
> ip address 10.1.2.1 255.255.255.0
> ipv6 address 2001:10:1:2::1/64
> !
> router bgp 1
> network 10.1.1.1 mask 255.255.255.255
> neighbor 10.1.2.2 remote-as 100
> !
> address-family ipv6
> network 2001:10:1:1::1/128
> neighbor 10.1.2.2 activate
> neighbor 10.1.2.2 route-map 6VPE in
> exit-address-family
> !
> route-map 6VPE permit 10
> set ipv6 next-hop 2001:10:1:2::2
>
> R2:
> vrf definition A
> rd 100:1
> !
> address-family ipv4
> route-target export 100:1
> route-target import 100:1
> exit-address-family
> !
> address-family ipv6
> route-target export 100:1
> route-target import 100:1
> exit-address-family
> !
> ip cef
> ipv6 unicast-routing
> ipv6 cef
> !
> interface Loopback0
> ip address 20.2.2.2 255.255.255.255
> !
> interface FastEthernet1/0
> vrf forwarding A
> ip address 10.1.2.2 255.255.255.0
> ipv6 address 2001:10:1:2::2/64
> !
> router bgp 100
> no bgp default ipv4-unicast
> neighbor 10.1.2.1 remote-as 1
> neighbor 20.19.19.19 remote-as 100
> neighbor 20.19.19.19 update-source Loopback0
> !
> address-family vpnv4
> neighbor 20.19.19.19 activate
> neighbor 20.19.19.19 send-community extended
> exit-address-family
> !
> address-family vpnv6
> neighbor 20.19.19.19 activate
> neighbor 20.19.19.19 send-community extended
> exit-address-family
> !
> address-family ipv4 vrf A
> neighbor 10.1.2.1 remote-as 1
> neighbor 10.1.2.1 activate
> exit-address-family
> !
> address-family ipv6 vrf A
> neighbor 10.1.2.1 remote-as 1
> neighbor 10.1.2.1 activate
> neighbor 10.1.2.1 route-map 6VPE in
> exit-address-family
> !
> route-map 6VPE permit 10
> set ipv6 next-hop 2001:10:1:2::1
>
> XR1:
> vrf A
> address-family ipv4 unicast
> import route-target
> 100:1
> !
> export route-target
> 100:1
> !
> !
> address-family ipv6 unicast
> import route-target
> 100:1
> !
> export route-target
> 100:1
> !
> !
> !
> interface Loopback0
> ipv4 address 20.19.19.19 255.255.255.255
> !
> interface GigabitEthernet0/1/0/2
> vrf A
> ipv4 address 10.19.20.19 255.255.255.0
> ipv6 address 2001:10:19:20::19/64
> !
> route-policy PASS
> pass
> end-policy
> !
> router bgp 100
> address-family vpnv4 unicast
> !
> address-family vpnv6 unicast
> !
> neighbor 20.2.2.2
> remote-as 100
> update-source Loopback0
> address-family vpnv4 unicast
> !
> address-family vpnv6 unicast
> !
> !
> vrf A
> rd 100:1
> address-family ipv4 unicast
> !
> address-family ipv6 unicast
> !
> neighbor 10.19.20.20
> remote-as 20
> address-family ipv4 unicast
> route-policy PASS in
> route-policy PASS out
> !
> address-family ipv6 unicast
> route-policy PASS in
> route-policy PASS out
> !
> !
> !
> !
>
> XR2:
> interface Loopback0
> ipv4 address 10.20.20.20 255.255.255.255
> ipv6 address 2001:10:20:20::20/128
> !
> interface GigabitEthernet0/4/0/2
> ipv4 address 10.19.20.20 255.255.255.0
> ipv6 address 2001:10:19:20::20/64
> !
> route-policy PASS
> pass
> end-policy
> !
> router bgp 20
> address-family ipv4 unicast
> network 10.20.20.20/32<http://10.20.20.20/32>
> !
> address-family ipv6 unicast
> network 2001:10:20:20::20/128
> !
> neighbor 10.19.20.19
> remote-as 100
> address-family ipv4 unicast
> route-policy PASS in
> route-policy PASS out
> !
> address-family ipv6 unicast
> route-policy PASS in
> route-policy PASS out
> !
> !
> !
>
> HTH,
>
> Brian McGahan, CCIE #8593 (R&S/SP/Security)
> bmcgahan_at_INE.com<mailto:bmcgahan_at_INE.com>
>
> Internetwork Expert, Inc.
> http://www.INE.com
>
>
> -----Original Message-----
> From: nobody_at_groupstudy.com<mailto:nobody_at_groupstudy.com>
> [mailto:nobody_at_groupstudy.com<mailto:nobody_at_groupstudy.com>] On Behalf Of
> GAURAV MADAN
> Sent: Thursday, January 19, 2012 11:35 AM
> To: Cisco certification
> Subject: Re: BGP for address-family ipv6 issue
>
> Thnx to all who responded ..
>
> This is a part of 6VPE thing that I am doing and I think that what I am
> doing
> is right .
>
> We can have a either IPV4 neighbor relationship between a PE and CE and
> advertise a IPV6 prefix from CE Or We can have a IPV6 neighbor relationship
> between PE and a CE and advertise a IPV6 prefix from CE
>
> Option B work for me .. However Option A is giving problems
>
> Any comments
>
> Thnx in advance
> Gaurav Madan
>
> On Thu, Jan 19, 2012 at 11:24 AM, GAURAV MADAN
> <gauravmadan1177_at_gmail.com<mailto:gauravmadan1177_at_gmail.com>>wrote:
>
> > Any idea experts ..?
> >
> >
> >
> > ---------- Forwarded message ----------
> > From: GAURAV MADAN
> <gauravmadan1177_at_gmail.com<mailto:gauravmadan1177_at_gmail.com>>
> > Date: Wed, Jan 18, 2012 at 10:56 PM
> > Subject: BGP for address-family ipv6 issue
> > To: Cisco certification
> <ccielab_at_groupstudy.com<mailto:ccielab_at_groupstudy.com>>
> >
> >
> > Hi All
> >
> > I have a very simple setup as follows . My intent is to let BGP form a
> > transport session using IPV4 reachability and then using
> > address-family
> > IPV6 .. I am advertising route from R5 to R4 :
> >
> >
> > R4 f/1(VRF) (40.0.0.1)---------------------------- (40.0.0.2) f1/0 R5
> >
> > R4 in AS 200
> > R5 in AS 100
> >
> > R4 config
> > =========
> >
> > R4#sh run | sec router bgp
> > router bgp 200
> > no synchronization
> > bgp log-neighbor-changes
> > no auto-summary
> > !
> > address-family ipv4 vrf TEST
> > no synchronization
> > exit-address-family
> > !
> > address-family ipv6 vrf TEST
> > no synchronization
> > neighbor 40.0.0.2 remote-as 100
> > neighbor 40.0.0.2 activate
> > exit-address-family
> >
> >
> >
> > R4#sh run int f1/1
> > Building configuration...
> >
> > Current configuration : 142 bytes
> > !
> > interface FastEthernet1/1
> > vrf forwarding TEST
> > ip address 40.0.0.1 255.255.255.0
> > speed auto
> > duplex auto
> > ipv6 address 2001:54::4/64
> > end
> >
> >
> > R5 Config
> > ==========
> > R5(config)#do sh run | sec router bgp
> > router bgp 100
> > no synchronization
> > bgp log-neighbor-changes
> > neighbor 40.0.0.1 remote-as 200
> > no auto-summary
> > !
> > address-family ipv6
> > no synchronization
> > network 2001::5/128
> > neighbor 40.0.0.1 activate
> > exit-address-family
> > R5(config)#
> >
> >
> > Following is error message :
> >
> > *Jan 18 22:51:34.291: %BGP-3-NOTIFICATION: received from neighbor
> > 40.0.0.1 active 2/8 (no supported AFI/SAFI) 3 bytes 000101 (timer
> > expired)
> >
> > I feel that i have properly configured the address family to form IPV6
> > neighbors .
> > Please let me know where am i missing .
> >
> > Thanks
> > Gaurav Madan
>
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Received on Fri Jan 20 2012 - 10:47:20 ART