As far as I can see, John is not using NAT, but a single Ethernet interface connected to a switch or a hub, serving two networks. It seems to be working since he can ping from one network to the other, but the problem with the DSL gateway is that it has a default gateway set to the provider, and the ping reply is thrown out and dropped by the provider.
If a route to the local (private) network was made on the DSL gateway, it should work. I would not recommend this solution, but instead as you say configure NAT, and get a 2514 or another router with two ethernet interfaces. Happy New Year. Ole ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Ole Drews Jensen Systems Network Manager CCNP, MCSE, MCP+I RWR Enterprises, Inc. [EMAIL PROTECTED] ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ http://www.RouterChief.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ NEED A JOB ??? http://www.oledrews.com/job ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -----Original Message----- From: Mark Odette II [mailto:[EMAIL PROTECTED]] Sent: Monday, December 31, 2001 12:23 AM To: [EMAIL PROTECTED] Subject: RE: can't ping an address from anywhere but the router itself [7:30519] Good point there Chuck. I should have paid closer attention to that little detail in my last post... DOH! The rest of what I said still stands though, as is the majority response- NAT will have to be used. ... though, I must say, Darrell's most recent reply to this thread was definitely interesting to me... never seen, or thought of that type of solution before... Will have to keep that in mind for those single-interface Cisco router situations. Of course, it probably won't work for PPPoE DSL, unless you can specify "next-hop 'interface-name'" in the route map I suppose. Hmm... very interesting. Mark Odette II ... who should be in bed at this time (12:30am CST). :) -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Sunday, December 30, 2001 11:41 PM To: [EMAIL PROTECTED] Subject: Re: can't ping an address from anywhere but the router itself [7:30514] I presume we all understand that 250.x.x.x is a fictitious address, i.e. is used here as an example, and cannot legally be used for any reason. :-> If Pac Bell assigned you a /24, and stated that dot 254 is the DSL gateway, do they mean that is your DSL router's ethernet port? that is, do you have a different address for the DSL/ATM side of things? My own experience is you have to be careful about what Pac Bell says. sometimes the terminology they use can be misleading to those of us in Ciscoland. ;-> I would expect that you would be doing NAT between your inside ( 192.x.x.x ) network and the public space you have been assigned. internet-----DSL_router---------firewall/router---------inside are you doing something different? Chuck ""Ole Drews Jensen"" wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... > First of all John, I don't believe this is a very good way of doing this, > because you are actually running two different networks on the same LAN: > 192.168.0.0/24 and 250.100.100.238/8. > > Anyway, I believe the problem lies in that the DSL GATEWAY has a default > gateway that points to PacBell, so when it receives a ping echo from your > workstation on network 192.168.0.0/24, it see's that it's not on it's own > network, and sends the ping reply to its default gateway, and your > workstation never receives the reply. > > In order for ping to work, the traffic must be able to travel both > directions. > > I don't know what kind of DSL gateway you have, but if you can tell it to > route traffic destined for network 192.168.0.0/24 to the router > (250.100.100.238), it should work, because the echo reply would then find > its way back to the workstation you're pinging from. > > Hth, > > Ole > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > Ole Drews Jensen > Systems Network Manager > CCNP, MCSE, MCP+I > RWR Enterprises, Inc. > [EMAIL PROTECTED] > http://www.RouterChief.com > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > NEED A JOB ??? > http://www.oledrews.com/job > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > -----Original Message----- > From: John Mairs [mailto:[EMAIL PROTECTED]] > Sent: Friday, December 28, 2001 4:27 PM > To: Ole Drews Jensen > Subject: RE: can't ping an address from anywhere but the router itself > [7:30328] > > > Im sorry, you're right, my explanation was not very > clear. the inside network is 192.168.0.0/24 and all > devices on that network are hosts. the addresses for > the list you have below is. lets say > > 250.100.100.254/24 (DSL gateway) > 250.100.100.238/24 (Static IP assigned to me from > pacbell assigned to e0 to) > 250.100.100.230/24 (for fun my printer) > > I can, from any host on the 192.168.0.0/24 (inside > network [192.168.0.1 e0 secondary) successfully ping > .238 and .230 but not .254 > > from the router I can successfully ping everything > including the gateway (.254). > > if I can ping .238 and the printer .230 from the > inside network (which means that the 2501 is resolving > or routing those addresses on the outside network) I > don't understand why .254 in unreachable (times out) > > here is the config > > Router3#show conf > using 886 pit pf 32762 bytes > ! > version 11.2 > no service password-encryption > no service udp-small-servers > no service udp-small-servers > ! > hostname Router3 > ! > enable secret 5 $1$llkfflkaiey.ddfakdjfadlkjrlll > enable password cisco > ! > no ip domain-lookup > ! > interface ethernet0 > ip address 192.168.0.1 255.255.255.0 secondary > ip address 250.100.100.238 255.255.255.0 > no mop enabled > ! > interface Serial0 > no ip address > ! > interface Serial1 > no ip address > ! > ip classless > ip route 192.168.0.0 255.255.255.0 250.100.100.254 > ! > banner login ^C > What in the hell do YOU want? > > ^C > banner motd ^C > By the way...how do you say "Elway" in pig latin? > > ^C > ! > line con 0 > line aux 0 > line vty 0 4 > password cisco > login > ! > end > > Router3# > > --- Ole Drews Jensen wrote: > > Maybe it's just me, but I'm a little confused here. > > > > As far as I can read on your e-mail, you have the > > following: > > > > On network 192.168.0.0 / 24 > > > > 192.168.0.230 Printer > > 192.168.0.238 Router > > 192.168.0.254 Gateway > > > > If you ping from the inside network to any of the > > three devices (above), the > > router should not route anything, because you're > > pinging to the same network > > you're on. > > > > I am not sure how exactly your whole setup is, but > > you should check that the > > subnet mask is / 24 (or 255.255.255.0) on all > > devices on the 192.168.0.0 > > network. > > > > Send the config from the router and gateway, plus a > > description on how all > > these things are connected. > > > > Hth, > > > > Ole > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > Ole Drews Jensen > > Systems Network Manager > > CCNP, MCSE, MCP+I > > RWR Enterprises, Inc. > > [EMAIL PROTECTED] > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > http://www.RouterChief.com > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > NEED A JOB ??? > > http://www.oledrews.com/job > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > -----Original Message----- > > From: John Mairs [mailto:[EMAIL PROTECTED]] > > Sent: Friday, December 28, 2001 10:57 AM > > To: [EMAIL PROTECTED] > > Subject: can't ping an address from anywhere but the > > router itself > > [7:30316] > > > > > > Hi, > > > > I have DSL with a static IP address/24. the gateway > > address is x.x.x.254 and the static IP/24 address > > that > > I have assigned the router is x.x.x.238. for fun I > > assigned x.x.x.230 to my printer. > > > > all addresses on the inside network are > > 192.168.0.x/24. > > > > I can ping x.x.x.238 and x.x.x.230 but not x.x.x.254 > > from the inside network. > > > > I can ping x.x.x.254 from the router (2501 with > > secondary ethernet) > > > > I can't understand why the router will route to the > > printer (x.x.x.230) but not the gateway (x.x.x.254) > > > > I am confused about my router's prejudicial ways. > > > > any thoughts > > > > ===== > > John L. Mairs > > > > __________________________________________________ > > Do You Yahoo!? > > Send your FREE holiday greetings online! > > http://greetings.yahoo.com > [EMAIL PROTECTED] > > > ===== > John L. Mairs > > __________________________________________________ > Do You Yahoo!? > Send your FREE holiday greetings online! > http://greetings.yahoo.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=30530&t=30530 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
