From: Kal Han (calikali2006@gmail.com)
Date: Mon Nov 13 2006 - 21:31:28 ART
Thanks Victor.
I am using the broadcast network... as shown below
R5#sh run int s0/0
Building configuration...
Current configuration : 480 bytes
!
interface Serial0/0
ip address 195.3.56.5 255.255.255.0
ip access-group 102 in
ip access-group 101 out
ip inspect idsin in
ip inspect ids out
encapsulation frame-relay
ip ospf authentication message-digest
ip ospf message-digest-key 1 md5 cciesec
ip ospf network point-to-multipoint
frame-relay map ip 195.3.56.3 503 broadcast
frame-relay map ip 195.3.56.6 506 broadcast
no frame-relay inverse-arp
frame-relay lmi-type cisco
crypto ipsec client ezvpn myezvpn
end
and if I look at the inbound access-list, you will notice that
both the host-to-host and host-to-ospf_multicast address have hit counts.
Can you please let me know why this is so ?
R5#sh access-li 102
Extended IP access list 102
* 1 permit ospf host 195.3.56.3 host 195.3.56.5 (178 matches)
2 permit ospf host 195.3.56.6 host 195.3.56.5 (204 matches)
* 5 permit udp host 195.3.56.3 host 195.3.56.5 eq ntp (412 matches)
10 permit tcp any host 195.1.5.25 eq www
20 permit tcp any host 195.1.5.25 eq 443
30 permit udp host 195.1.114.4 host 195.3.56.5 eq isakmp (24 matches)
40 permit udp host 195.1.114.4 host 195.3.56.5 eq non500-isakmp
50 permit esp host 195.1.114.4 host 195.3.56.5 (32 matches)
60 permit ospf host 195.3.56.3 host 224.0.0.9
* 70 permit ospf host 195.3.56.3 host 224.0.0.5 (477 matches)
80 permit ospf host 195.3.56.6 host 224.0.0.5 (476 matches)
* 90 deny ip any any log (192 matches)
Thanks
Kal
On 11/13/06, Victor Cappuccio <vcappuccio@desca.com> wrote:
>
> Hi Kal, this is very well explained in the Internetwork Experts CODs.
>
> Frame-relay is NBMA as you stated, but you can add support to use
> broadcast using the frame-relay map ip x.x.x.x DLCI broadcast if the SP
> Equipment allows that off course.
>
> Now the point-to-multipoint is used to low the number of frame-relay map
> needed at the spokes because this network type would create a /32 of
> every router in the frame-relay cloud
>
> There is a ospf network type named ip ospf point-to-multipoint
> nonbroadcast, that u use when you do not have broadcast capabilities in
> the NBMA Cloud
> (in this case you need to specify the neighbors because you are not
> multicasting (broadcast) traffic out those interfaces)
>
> http://www.cisco.com/en/US/products/sw/iosswrel/ps1826/products_feature_
> guide09186a0080087d4e.html#xtocid272779
>
>
> Saludos,
> Victor.-
>
>
>
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Kal Han
> Sent: Lunes, 13 de Noviembre de 2006 08:03 p.m.
> To: Cisco certification; ccielab
> Subject: ip ospf network point-to-multipoint
>
> Hi
> when I use the ip ospf network point-to-multipoint command,
> on a point to multipoint serial interface ,
> will the neighbors talk using multicast ospf messages or
> do they unicast ?
> How will the neighbor relationship come up ?
> I understand this is NBMA but I didnt understand how it will
> use the unicast messages.
> Will it get the neighbor IP based on "frame-relay map ip"
> command we configure ?
> Its just confusing !
>
> Thanks
> Kal
>
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