What do your "debug ip routing", "debug ip icmp", and "debug ip packet detail" show when you are able to successfully ping?
Thanks, Vince Mashburn HP Americas Technology Services Account Services Manager FedEx On-site Office Phone: 901-263-6498 Mobile: 901-568-8225 From: Taqdir Singh [mailto:[email protected]] Sent: Tuesday, September 01, 2009 10:23 AM To: Mashburn, Vince Cc: cyrus riobah; [email protected] Subject: Re: [OSL | CCIE_RS] No IP Routing ISSUE Please find attached configurations + diagram Just again my question is How I am able to ping 172.16.10.1 from R2 where there is no route + even no default gateway configured ? I am really curious to know. On Tue, Sep 1, 2009 at 8:46 PM, Mashburn, Vince <[email protected]<mailto:[email protected]>> wrote: Send us the configs of you R0 please. Thanks, Vince Mashburn From: [email protected]<mailto:[email protected]> [mailto:[email protected]<mailto:[email protected]>] On Behalf Of Taqdir Singh Sent: Tuesday, September 01, 2009 8:00 AM To: cyrus riobah Cc: [email protected]<mailto:[email protected]> Subject: Re: [OSL | CCIE_RS] No IP Routing ISSUE Please note , I am sitting on router R2 and I am pinging from there to loopback 172.16.10.1 which on router R0. On router R2 - I have disabled ip routing. then how come I am able to ping loopback on router R0 even if there is no route in R2? On Tue, Sep 1, 2009 at 6:15 PM, cyrus riobah <[email protected]<mailto:[email protected]>> wrote: Its never possible to be able to ping over a serial link (in fact a network on different subnets) without the routing involved. With the output of sh ip route on your R0, the statement ""S* 0.0.0.0/0<http://0.0.0.0/0> is directly connected, Serial0/0"" indicates that this is s static route readily configured to R0 hence makes it to ping anything connected to R0. Possibly, check all your router for a static route, S* indicates its existence. Regards Cyrus CCNP,CCDA,ARFE,WAAS,AWLANFE,XF On 9/1/09, Taqdir Singh <[email protected]<mailto:[email protected]>> wrote: > Please see my attached diagram. > Just curious to know , how ping is successfull sitting on router R2 to > destination 172.16.10.1 though on R2 I have disabled ip routing and even > there is no default-gateway configured. > > Other curious thing I want to know - If i configure any loopback interface > on router R2.. and then try to ping 172.16.10.1 it is unsuccessfull. > > Could any1 please help whats going on here on router R2 ? > > R0#sh ip ro > Codes: C - connected, S - static, 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 > i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 > ia - IS-IS inter area, * - candidate default, U - per-user static > route > o - ODR, P - periodic downloaded static route > > Gateway of last resort is 0.0.0.0 to network 0.0.0.0 > > 172.16.0.0/24<http://172.16.0.0/24> is subnetted, 1 subnets > C 172.16.10.0 is directly connected, Loopback0 > 10.0.0.0/24<http://10.0.0.0/24> is subnetted, 1 subnets > C 10.1.1.0 is directly connected, Serial0/0 > S* 0.0.0.0/0<http://0.0.0.0/0> is directly connected, Serial0/0 > R0#echo reply rcvd, src 172.16.10.1, dst 172.32. > R0# > ================ > > R1#sh ip ro > Codes: C - connected, S - static, 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 > i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 > ia - IS-IS inter area, * - candidate default, U - per-user static > route > o - ODR, P - periodic downloaded static route > > Gateway of last resort is not set > > 172.16.0.0/24<http://172.16.0.0/24> is subnetted, 1 subnets > S 172.16.10.0 is directly connected, Serial0/1 > 172.32.0.0/24<http://172.32.0.0/24> is subnetted, 1 subnets > C 172.32.1.0 is directly connected, Serial0/2 > 10.0.0.0/24<http://10.0.0.0/24> is subnetted, 1 subnets > C 10.1.1.0 is directly connected, Serial0/1 > R1# > ===================== > > R2#sh ip ro > Default gateway is not set > > Host Gateway Last Use Total Uses Interface > ICMP redirect cache is empty > R2#ping 172.16.10.1 > > Type escape sequence to abort. > Sending 5, 100-byte ICMP Echos to 172.16.10.1, timeout is 2 seconds: > !!!!! > Success rate is 100 percent (5/5), round-trip min/avg/max = 12/48/136 ms > R2# > > > -- > Taqdir Singh > CCNP- (R), CCNA > 09911709496 > > Do today what others won't so you can live tomorrow as others can't > -- Taqdir Singh CCNP- (R), CCNA 09911709496 Do today what others won't so you can live tomorrow as others can't -- Taqdir Singh CCNP- (R), CCNA 09911709496 Do today what others won't so you can live tomorrow as others can't
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