Re: How to advertise ethernet IP as /32 in BGP

not sure that is has any 'real world value'...

meaning do not know if it will work for anything other than getting the /32
into the BGP table...

and i am unclear on what the actual requirement is other than i remeber
reading at some point want to get /32 into the BGP table, from a f0/0
interface...

but this will work:

int loop32
ip add 32.32.32.32 255.255.255.255

int f0/1.1
ip unnumbered Loopback32

router bgp 32
network 32.32.32.32 255.255.255.255
 --
Garry L. Baker

"With sufficient thrust, pigs fly just fine..." - RFC 1925

On Thu, Mar 31, 2011 at 3:43 PM, Mathew <mathewfer_at_gmail.com> wrote:

> Hi Adam/All,
>
> Thank you for the reply & the configuration.
> Sorry, I am bit new to PPPoE configurations.
>
> It seems we need to get the PPPoE between the 2 routers. Yes, I see it
> is working. In my setup, I am looking a way to originate this /32
> within the router itself as this is required on a CE router connecting
> to a PE. It is not very easy to make PPPoE configurations on a PE
> router.
>
> Anyway, I will further study your configuration & also will see others
> reply if any more.
>
> Regards,
>
> Mathew
>
>
> On Thu, Mar 31, 2011 at 11:19 PM, Adam Means <adam.means_at_gmail.com> wrote:
> > Matthew,
> >
> > PPPoE w/ ip unnumbered works as described so see if this answers your
> > question. You need to apply the /32 to the loopback and then apply ip
> > unnumbered loopbackX to the virtual-template interface and respective
> client
> > dialer interface. Running 12.4 and it'd be something along lines of:
> >
> > R1:f0/0 <---> R2:f0/0
> >
> > R1:
> > bba-group pppoe global
> > virtual-template 1
> > int lo0
> > ip add 1.1.1.1 255.255.255.255
> > interface virtual-te1
> > ip unnumbered lo0
> > interface f0/0
> > pppoe enable group global
> > router bgp 12
> > neighbor 2.2.2.2 remote 12
> > network 1.1.1.1 mask 255.255.255.255
> > network 2.2.2.2 mask 255.255.255.255
> >
> > R2:
> > interface dialer1
> > mtu 1492
> > ip unnumbered lo0
> > encap ppp
> > dialer pool 1
> > dialer persistent
> > interface f0/0
> > pppoe enable
> > pppoe-client dial-pool-number 1
> > router bgp 12
> > neighbor 1.1.1.1 remote 12
> > network 2.2.2.2 mask 255.255.255.255
> > network 1.1.1.1 mask 255.255.255.255
> >
> >
> >
> > R1(config-router)#do sh bgp ipv4 uni
> > BGP table version is 6, local router ID is 1.1.1.1
> > Status codes: s suppressed, d damped, h history, * valid, > best, i -
> > internal,
> > r RIB-failure, S Stale
> > Origin codes: i - IGP, e - EGP, ? - incomplete
> >
> > Network Next Hop Metric LocPrf Weight Path
> > * i1.1.1.1/32 2.2.2.2 0 100 0 i
> > *> 0.0.0.0 0 32768 i
> > * i2.2.2.2/32 2.2.2.2 0 100 0 i
> > *> 0.0.0.0 0 32768 i
> >
> > R1(config-router)#do sh ip route
> > Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
> > D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
> > N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
> > E1 - OSPF external type 1, E2 - OSPF external type 2
> > i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS
> level-2
> > ia - IS-IS inter area, * - candidate default, U - per-user static
> > route
> > o - ODR, P - periodic downloaded static route
> >
> > Gateway of last resort is not set
> >
> > 1.0.0.0/32 is subnetted, 1 subnets
> > C 1.1.1.1 is directly connected, Loopback0
> > 2.0.0.0/32 is subnetted, 1 subnets
> > C 2.2.2.2 is directly connected, Virtual-Access1.1
> >
> >
> >
> >
> > On Thu, Mar 31, 2011 at 12:38 AM, Mathew <mathewfer_at_gmail.com> wrote:
> >>
> >> Hi Jules,
> >>
> >> Thank you again for your reply & testing it.
> >>
> >> How did you get the loopback configured with the same IP as Ethernet
> >> with /32 mask.
> >> For me, I can not get the loopback. Did you have the Ethernet also
> >> with the same address but different mask - like 24. See below.
> >> I think if I can get the loopback interface configured, we can
> >> advertise it straight in BGP. Is'n it?
> >>
> >> What am I missing here?
> >>
> >> Please check your configuration again for me, how you tested it & let
> >> us see your full config with the IOS ver tested.
> >>
> >> Thank you again for your reply.
> >>
> >> R2#sho runn int fast 0/0
> >> Building configuration...
> >>
> >> Current configuration : 530 bytes
> >> !
> >> interface FastEthernet0/0
> >> ip address 10.100.40.2 255.255.255.0
> >> end
> >>
> >> R2#conf t
> >> Enter configuration commands, one per line. End with CNTL/Z.
> >> R2(config)#int loopback 44
> >> R2(config-if)#ip address 10.100.40.2 255.255.255.255
> >> % 10.100.40.2 overlaps with FastEthernet0/0
> >> R2(config-if)#
> >>
> >> Regards,
> >>
> >> Mathew
> >>
> >> On Thu, Mar 31, 2011 at 11:47 AM, jules NYA BAWEU <nyabaweu_at_gmail.com>
> >> wrote:
> >> > Can you try getting around with the PPPOE client config?
> >> >
> >> > loo100 -- > 10.100.40.2 255.255.255.255
> >> > dialer 1 -- > unnumbered loo100
> >> > then link fa0/0 to the dialer pool
> >> >
> >> > You should then use the /32 network in statement in the BGP section.
> >> >
> >> > I just tried it and able to advertise the /32. Sorry if I missed some
> >> > details in you requirement
> >> >
> >> > On Wed, Mar 30, 2011 at 5:33 PM, Mathew <mathewfer_at_gmail.com> wrote:
> >> >>
> >> >> Hi Aaron,
> >> >>
> >> >> Thank you for the reply.
> >> >>
> >> >> No, I did not try because I am trying to find a way to get /32.
> Reason
> >> >> is that this project involve many routers & we are limited with IPs.
> >> >>
> >> >> Any more ideas?
> >> >>
> >> >>
> >> >> Mathew
> >> >>
> >> >>
> >> >> On Thu, Mar 31, 2011 at 10:52 AM, Aaron <aaron1_at_gvtc.com> wrote:
> >> >> > You tried a /31?
> >> >> >
> >> >> > Aaron
> >> >> >
> >> >> > On Mar 30, 2011, at 6:21 PM, Mathew <mathewfer_at_gmail.com> wrote:
> >> >> >
> >> >> >> Hi Hubert/All,
> >> >> >>
> >> >> >> I tried the sub-interface options you suggested but it did not
> work,
> >> >> >> see below. I tried before to enter /32 IP under main Ethernet
> >> >> >> interface & it did not take /32 IP & it seems same with a
> >> >> >> sub-interface too.
> >> >> >>
> >> >> >> Any other ideas are welcome as I have ran out of options but I
> >> >> >> believe
> >> >> >> there should be a way to do this too.
> >> >> >>
> >> >> >> R2(config)#int FastEthernet0/0.1
> >> >> >>
> >> >> >> R2(config-subif)#encapsulation dot1Q 1
> >> >> >> R2(config-subif)#ip address 2.2.2.2 255.255.255.255
> >> >> >> Bad mask /32 for address 2.2.2.2
> >> >> >> R2(config-subif)#ip address 2.2.2.2 255.255.255.252
> >> >> >> R2(config-subif)#do sho runn int FastEthernet0/0.1
> >> >> >> Building configuration...
> >> >> >>
> >> >> >> Current configuration : 101 bytes
> >> >> >> !
> >> >> >> interface FastEthernet0/0.1
> >> >> >> encapsulation dot1Q 1 native
> >> >> >> ip address 2.2.2.2 255.255.255.252
> >> >> >> end
> >> >> >>
> >> >> >> R2(config-subif)#
> >> >> >>
> >> >> >> Regards
> >> >> >>
> >> >> >> Mathew
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> On Thu, Mar 31, 2011 at 9:33 AM, Hubert Hinsley
> >> >> >> <hubert.hinsley_at_gmail.com> wrote:
> >> >> >>> Hello, would it be possible to achieve the solution via
> >> >> >>> subinterfaces
> >> >> >>> on the
> >> >> >>> router ethernet interface? One with a /32 address and one with a
> >> >> >>> /24?
> >> >> >>> Or,
> >> >> >>> possibly via primary and secondary ip addresses on the same
> >> >> >>> interface?
> >> >> >>> Apologies if I have misunderstood the question.Regards, Hubert.
> >> >> >>>
> >> >> >>> On 30 Mar 2011 20:53, "Mathew" <mathewfer_at_gmail.com> wrote:
> >> >> >>>
> >> >> >>> Hi Stephen,
> >> >> >>>
> >> >> >>> Thank you for the reply.
> >> >> >>> Yes, I need to be advertise in BGP. So unfortunately, PPP idea
> can
> >> >> >>> not
> >> >> >>> be used here.
> >> >> >>>
> >> >> >>> Mathew
> >> >> >>>
> >> >> >>> On Wed, Mar 30, 2011 at 6:32 AM, Narbik Kocharians
> >> >> >>> <narbikk_at_gmail.com>
> >> >> >>> wrote:
> >> >> >>>> Mathew,
> >> >> >>>>
> >> >> >>>> Does it...
> >> >> >>>
> >> >> >>>> Sr. Technical Instructor
> >> >> >>>> Ask about our FREE Lab Voucher with our Boot Camps
> >> >> >>>> YES! We take Cisco...
> >> >> >>>
> >> >> >>> --
> >> >> >>>
> >> >> >>> Thanks
> >> >> >>>
> >> >> >>> Mathew
> >> >> >>>
> >> >> >>>
> >> >> >>> Blogs and organic groups at http://www.ccie.net
> >> >> >>>
> >> >> >>> __________________________________...
> >> >> >>
> >> >> >>
> >> >> >>
> >> >> >> --
> >> >> >> Thanks
> >> >> >>
> >> >> >> Mathew
> >> >> >>
> >> >> >>
> >> >> >> Blogs and organic groups at http://www.ccie.net
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> >> >>
> >> >>
> >> >> --
> >> >> Thanks
> >> >>
> >> >> Mathew
> >> >>
> >> >>
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> >> --
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> >>
> >> Mathew
> >>
> >>
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> --
> Thanks
>
> Mathew

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Received on Thu Mar 31 2011 - 16:29:18 ART