Re: NAT dilemma [7:42762]

2002-04-28 Thread Chuck
interesting question. without tearing up my pod to set up a QD, let me try a little logic here. when the router checks its FIB, and determines that the packet in question is to go out a particular interface ( as opposed to a network ) what happens then? does the router place that packet onto the

Re: NAT dilemma [7:42762]

2002-04-28 Thread Howard C. Berkowitz
Chuck shaped electrons, photons, and little dot things to say: interesting question. without tearing up my pod to set up a QD, let me try a little logic here. when the router checks its FIB, and determines that the packet in question is to go out a particular interface ( as opposed to a network

Re: NAT dilemma [7:42762]

2002-04-28 Thread Marty Adkins
Michael L. Williams wrote: Paul Lalonde wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... but routing out via an Ethernet interface will likely just *drop* the packet onto that broadcast domain (subnet) without pointing it to a specific next hop. This raises an

Re: NAT dilemma [7:42762]

2002-04-28 Thread Michael L. Williams
Marty Adkins wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... One might think that a static route to a broadcast interface type would be ambiguous for layer 2, and it is. But what IOS does in that case is just ARP for the destination IP and hope it gets an answer. It will work,

Re: NAT dilemma [7:42762]

2002-04-28 Thread JohnZ
Wow Thank you all, I have definitely learned a lot from this. When I do sh IP route I can see that I am getting a default route from the cable provider. Earlier when I was trying to figure out this problem I was running several debugs and I saw encapsulation failed errors which is in line with

NAT dilemma [7:42762]

2002-04-27 Thread John Zaggat
Hi guys/gals, I am using a 1605R with 2 ethernet interfaces as gateway to my cable service provider. My dilemma is that when I put a default route to outside NAT stops working. I verified this by using a sniffer. Without default route everything seems to work fine but it's just bugging the hell

Re: NAT dilemma [7:42762]

2002-04-27 Thread Michael L. Williams
When you have ths default route in place, and do a 'show ip route' what does your routing table show? Mike W. John Zaggat wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hi guys/gals, I am using a 1605R with 2 ethernet interfaces as gateway to my cable service provider. My

Re: NAT dilemma [7:42762]

2002-04-27 Thread JZ
Router#sh ip route Codes: C - connected, S - static, I - IGRP, 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, E -

Re: NAT dilemma [7:42762]

2002-04-27 Thread JZ
Here is sh ip routeRouter#sh ip route Codes: C - connected, S - static, I - IGRP, 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

Re: NAT dilemma [7:42762]

2002-04-27 Thread Paul Lalonde
John, Two things I can think of: 1. The cable provider is probably providing you with a default gateway *anyways* in your DHCP request. Likely, you don't need that static route after all. 2. As far as I can tell, your route wouldn't work in any event. Routing out via a physical interface

Re: NAT dilemma [7:42762]

2002-04-27 Thread Michael L. Williams
Strange... it says gateway of last resort if 0.0.0.0 to network 0.0.0.0... appears it's trying to route everything to itself so to speak.. in most examples and cases, I've seen something like this: Gateway of last resort is 161.44.192.2 to network 198.10.1.0 Perhaps instead of using the

Re: NAT dilemma [7:42762]

2002-04-27 Thread JZ
The interesting thing is that I see the packet on the outside wire trying to reach it's destination. I used sniffer to test this. So basically when I have this route in place I go to a workstation on the inside network and ping a public address. I get the ICMP query being performed but

Re: NAT dilemma [7:42762]

2002-04-27 Thread JZ
Correction I meant the ICMP request instead of DNS query. Sorry JZ wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... The interesting thing is that I see the packet on the outside wire trying to reach it's destination. I used sniffer to test this. So basically when I have this

Re: NAT dilemma [7:42762]

2002-04-27 Thread Michael L. Williams
Paul Lalonde wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... but routing out via an Ethernet interface will likely just *drop* the packet onto that broadcast domain (subnet) without pointing it to a specific next hop. This raises an interesting question: If you try to make a