From: nenad pudar (nenad.pudar@gmail.com)
Date: Mon Jan 02 2006 - 00:54:27 GMT-3
Just realized that eigrp with conifg below is nor working properly.
See few session flaps and more importantly I see no route exchanged be teen
eigrp neighbors
nenad
On 1/1/06, nenad pudar <nenad.pudar@gmail.com> wrote:
>
> Hi guys
>
> I am trying to unicast the eigrp update between two neighbors using nat
> It is working but I do not understand the principe behind this
>
> Here is the config
> interface Virtual-Template1
> bandwidth 512
> ip address 172.16.32.130 255.255.255.192
> ip nat outside **************************************
> ip authentication mode eigrp 2 md5
> ip authentication key-chain eigrp 2 ccie
> ip summary-address eigrp 2 10.17.2.0 255.255.255.0 5
> ppp authentication chap PPP
> ppp chap hostname r1
> end
>
>
>
> ip nat outside source static 172.16.32.129 224.0.0.10 ********************
>
>
> #R1sh ip eigrp neighbors
> IP-EIGRP neighbors for process 2
> H Address Interface Hold Uptime SRTT RTO Q
> Seq Type
> (sec) (ms) Cnt
> Num
> 0 172.16.32.129 Vi1 14 00:00:18 1 5000 1
> 0
> IP-EIGRP neighbors for process 3
>
> .855: NAT: s=172.16.32.130, d=224.0.0.10->172.16.32.129 [0]
> Jan 2 03:23:46.199: NAT: i: eigrp (172.16.32.130 , 0) -> (224.0.0.10, 0)
> [0]
> Jan 2 03:23:46.199: NAT: s=172.16.32.130, d=224.0.0.10->172.16.32.129 [0]
> Jan 2 03:23:50.783: NAT: i: eigrp (172.16.32.130, 0) -> (224.0.0.10, 0)
> [0]
> Jan 2 03:23:50.783: NAT: s=172.16.32.130 , d=224.0.0.10->172.16.32.129[0]
> Jan 2 03:23:55.535: NAT: i: eigrp (172.16.32.130, 0) -> (224.0.0.10, 0)
> [0]
> Jan 2 03:23:55.535: NAT: s=172.16.32.130, d=224.0.0.10->172.16.32.129 [0]
> Jan 2 03:24:00.271: NAT: i: eigrp ( 172.16.32.130, 0) -> (224.0.0.10, 0)
> [0]
> Jan 2 03:24:00.271: NAT: s=172.16.32.130, d=224.0.0.10->172.16.32.129 [0]
>
> #R1sh ip nat translations
> Pro Inside global Inside local Outside local
> Outside global
> --- 172.16.32.130 172.16.32.130 224.0.0.10
> 172.16.32.129
>
> I did this following one similar example in Cisco book but I do not get it
>
>
> ip nat outside source static 172.16.32.129 224.0.0.10 statement according
> to my understanding of how NAT works will:
>
> 1) Translate the source address 172.16.32.129 to 224.0.0.10 once the
> packet hits outside interface
> 2) It will also translate the destination address 224.0.0.10 to
> 172.16.32.129 once the packet hits the inside interface
>
> Above you can see the nat log
>
> This statement
>
> Jan 2 03:23:46.199: NAT: s= 172.16.32.130, d=224.0.0.10->172.16.32.129
>
> I can understand assuming that since the packet are locally generated
> router "does not need explicitly defined inside interface"
>
> But I do not really get what is happening with the packet coming from the
> other side
>
>
> Anybody can help me about this one .
>
> thanks
> nenad
This archive was generated by hypermail 2.1.4 : Wed Feb 01 2006 - 07:45:47 GMT-3