Re: BGP for address-family ipv6 issue

Gaurav

It is working perfectly for me. I emulated the same configs what u have
done.
I have given IPV6 explicit next hop IP Address and it is working perfectly.

I havent given no bgp default ipv4 unciast

Why we should give the above command to work for transferring these IPv6
routes. ?

I cant understand the logic

On Sat, Jan 21, 2012 at 8:27 AM, Sakthivel <sakthi.cloud_at_gmail.com> wrote:

> Hi
>
> Please see hidden routes by issuing the sh bgp ipv6 unicast
>
> you will notice the route is not selected as best route because the next
> would be something like this f:f:f:f:10.10.10.1 this is fine for MBGP
> VPN6 connectivity over IPV4 MPLS core, but this is not correct for this
> case hence you need to manually change next hop using route maps setting
> the next hops for both routers.
>
> Please follow the route map commands mentioned in the mail chain ..
>
>
> HTH
>
> Thanks and regards
> Sakthivel
> CCIE 7675 (R&S, SP V3)
>
>
>
>
> On Fri, Jan 20, 2012 at 10:52 PM, GAURAV MADAN <gauravmadan1177_at_gmail.com
> >wrote:
>
> > Hi Sakthivel
> >
> > Thanks for reply .. One problem gone .. One still pending ( "no bgp
> > default ipv4-unicast " helped in bring session UP)
> > I am once again posting my config ..... My session comes up ..
> >
> > But somehow IPV6 routes advertised by CE are not received on PE
> >
> >
> > R1 (CE)
> > ======
> > R1(config)#do sh run | sec router bgp
> > router bgp 100
> > no bgp default ipv4-unicast
> > bgp log-neighbor-changes
> > neighbor 10.0.0.2 remote-as 200
> > !
> > address-family ipv4
> > no synchronization
> > no auto-summary
> > exit-address-family
> >
> > !
> > address-family ipv6
> > no synchronization
> > network 2001::1/128
> > neighbor 10.0.0.2 activate
> > exit-address-family
> > R1(config)#
> >
> >
> > R2 (PE)
> > ======
> > R2(config)#do sh run | sec router bgp
> > router bgp 200
> > no bgp default ipv4-unicast
> > bgp log-neighbor-changes
> >
> > !
> > address-family ipv4 vrf TEST
> > no synchronization
> > exit-address-family
> > !
> > address-family ipv6 vrf TEST
> > no synchronization
> > neighbor 10.0.0.1 remote-as 100
> > neighbor 10.0.0.1 activate
> > exit-address-family
> > R2(config)#
> >
> > R2#sh bgp vpnv4 unicast vrf TEST summary
> >
> > R2#sh ipv6 route vr
> > R2#sh ipv6 route vrf TEST
> > IPv6 Routing Table - TEST - 3 entries
> > Codes: C - Connected, L - Local, S - Static, U - Per-user Static route
> > B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2
> > IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP
> > external
> > ND - Neighbor Discovery
> > O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext
> 2
> > ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2
> > C 2001:12::/64 [0/0]
> > via FastEthernet1/0, directly connected
> > L 2001:12::2/128 [0/0]
> > via FastEthernet1/0, receive
> > L FF00::/8 [0/0]
> > via Null0, receive
> > R2#
> >
> >
> > PLease let me know if more configs are desired.
> >
> > Thanks
> > Gaurav Madan
> >
> >
> >
> > On Fri, Jan 20, 2012 at 10:47 AM, Sakthivel <sakthi.cloud_at_gmail.com
> >wrote:
> >
> >> 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 Sun Jan 22 2012 - 15:01:33 ART