Tunji,
See Inline...
----- Original Message -----
From: "Tunji Suleiman"
To:
Sent: Saturday, August 03, 2002 5:20 AM
Subject: Routing with IP Unnumbered Loopback [7:50581]
> Hi all,
>
> I am reposting this because there were no responses to the first post. I
am
> trying to conserve IP addresses by using private IPs for dialin users.
NT: Ok, so as you mentioned you're trying to conserve IP address by using
private IPs for dialin users. Question? When you make use of those
private(rfc1918) addresses are they routable?
>From
> clients I can dial in to network but cant get beyond 3640 NAS, cant even
> ping 3640 E0/0 LAN IP address. From 3640, I can ping Lo0 from E0/0 and
vice
> versa; I can ping connected client on any Async sourcing Lo0, but not
E0/0;
> and I can ping Internet hosts eg www.yahoo.com sourcing e0/0 but not
> loopback0.
To answer part of the question; "Yes" the outbound packet will be routable
"only"
because you have a 0/0 route, that will route any packet to the "next-hop"
based on
the static default route. We all know routing is bi-directional(I'm hoping
:->), which
now begs the question, "How does this private block of IPs you use get
routed back to
you(your network)? Will anyone in the Internet route these packets back to
you?
Once you answer these questions.. then check out this link!
http://www.cisco.com/warp/public/556/12.html
HTH
Nigel
>From 2611 Internet gateway, I can ping 3640 E0/0 and Lo0, but not
> a connected dialin user on any Async with private IP address assigned by
> 3640 from IP pool. I have a routing issue that makes traffic in both
> directions get to and disappear at 3640 Lo0, but strangely all necessary
> routes (that I can think of) are installed in the route tables. Can
somebody
> pls point out what I'm missing? Below are my configs and route tables:
>
> 3640-NAS Config:
> interface Loopback0
> ip address 192.168.200.254 255.255.255.0
> !
> interface Ethernet0/0
> ip address 216.199.175.12 255.255.255.224
> !
> interface Group-Async1
> ip unnumbered Loopback0
> peer default ip address pool PRIVATE
> !
> router eigrp 10
> network 192.168.1.0
> network 192.168.200.0
> network 216.199.175.0
> no auto-summary
> !
> ip local pool PRIVATE 192.168.200.41 192.168.200.88
> ip classless
> ip route 0.0.0.0 0.0.0.0 216.199.175.1
>
> 3640-NAS Route Table:
> Gateway of last resort is 216.199.175.1 to network 0.0.0.0
>
> 216.199.175.0/27 is subnetted, 1 subnets
> C 216.199.175.0 is directly connected, Ethernet0/0
> 192.168.200.0/24 is variably subnetted, 2 subnets, 2 masks
> C 192.168.200.52/32 is directly connected, Async101
> C 192.168.200.0/24 is directly connected, Loopback0
> 192.168.1.0/30 is subnetted, 1 subnets
> D 192.168.1.0 [90/2195456] via 216.199.175.1, 00:58:16, E0/0
> S* 0.0.0.0/0 [1/0] via 216.199.175.1
>
>
> 2611-Gateway Config:
> interface Ethernet0/0
> ip address 216.199.175.1 255.255.255.224
> !
> interface Serial0/0
> ip address 192.168.1.2 255.255.255.252
> !
> router eigrp 10
> network 192.168.1.0
> network 192.168.200.0
> network 216.199.175.0
> no auto-summary
> !
> ip classless
> ip route 0.0.0.0 0.0.0.0 192.168.1.1
>
> 2611-Gateway Route Table:
> Gateway of last resort is 192.168.1.1 to network 0.0.0.0
>
> 216.199.175.0/27 is subnetted, 1 subnets
> C 216.199.175.0 is directly connected, Ethernet0/0
> 192.168.200.0/24 is subnetted, 1 subnets
> D 192.168.200.0 [90/409600] via 216.199.175.12, 07:51:45, Et0/0
> 192.168.1.0/30 is subnetted, 1 subnets
> C 192.168.1.0 is directly connected, Serial0/0
> S* 0.0.0.0/0 [1/0] via 192.168.1.1
>
> TIA
>
> Tunji
>
>
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