Routing loop. 
Perhaps can you show us how you configure the redist?   ( "sh run | b router" )



Cheers

Ben

> Date: Fri, 5 Aug 2011 13:45:39 -0400
> From: [email protected]
> To: [email protected]
> CC: [email protected]
> Subject: Re: [OSL | CCIE_RS] Volume2_Lab2-Redistribution R4toR1
> 
> Watch what address you are sourcing the pings from.  If you dont specify it
> will be the outgoing interface based on the routing table.   R2 or another
> router in the path doesnt have a route back to the outgoing interface on R4
> that the ping is leaving from.
> 
>   Check your show ip routes in both directions for the IP addresses that
> your pings are sourced from
> 
> Aaron
> 
> 
> 
> 
> 
> On Sun, Jul 31, 2011 at 1:32 PM, Benjamin Long <[email protected]>wrote:
> 
> > Hi,
> >
> > I just completed redistribution and I cannot ping from R4 to R1. I can ping
> > from R1 to R4.
> >
> > Any ideas on what to look at? Thanks in advance!
> >
> > R4#sh ip route 10.10.10.1
> > Routing entry for 10.10.10.1/32
> >  Known via "eigrp 20", distance 170, metric 2560512256
> >  Tag 85, type external
> >  Redistributing via eigrp 20
> >  Last update from 216.30.1.6 on Serial0/0/0, 00:04:44 ago
> >  Routing Descriptor Blocks:
> >    216.30.1.6, from 216.30.1.6, 00:04:44 ago, via Serial0/0/0
> >      Route metric is 2560512256, traffic share count is 1
> >      Total delay is 20010 microseconds, minimum bandwidth is 1 Kbit
> >      Reliability 1/255, minimum MTU 1 bytes
> >      Loading 1/255, Hops 1
> >      Route tag 85
> >  * 216.30.1.5, from 216.30.1.5, 00:04:44 ago, via Serial0/0/0
> >      Route metric is 2560512256, traffic share count is 1
> >      Total delay is 20010 microseconds, minimum bandwidth is 1 Kbit
> >      Reliability 1/255, minimum MTU 1 bytes
> >      Loading 1/255, Hops 1
> >      Route tag 85
> >
> > R4#ping 216.30.1.5
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 216.30.1.5, timeout is 2 seconds:
> > !!!!!
> > Success rate is 100 percent (5/5), round-trip min/avg/max = 28/31/32 ms
> >
> > R4#ping 10.10.10.1
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:
> > .....
> > Success rate is 0 percent (0/5)
> >
> > R4#traceroute 10.10.10.1
> >
> > Type escape sequence to abort.
> > Tracing the route to 10.10.10.1
> >
> >  1 216.30.1.5 16 msec
> >    216.30.1.6 8 msec
> >    216.30.1.5 16 msec
> >  2 216.30.100.5 16 msec
> >    216.30.25.2 16 msec
> >    216.30.100.5 12 msec
> >  3
> > *Aug  8 22:39:24.747: ICMP: time exceeded rcvd from 216.30.1.5
> > *Aug  8 22:39:24.755: ICMP: time exceeded rcvd from 216.30.1.6
> > *Aug  8 22:39:24.771: ICMP: time exceeded rcvd from 216.30.1.5
> > *Aug  8 22:39:24.787: ICMP: time exceeded rcvd from 216.30.100.5
> > *Aug  8 22:39:24.803: ICMP: time exceeded rcvd from 216.30.25.2
> > *Aug  8 22:39:24.815: ICMP: time exceeded rcvd from 216.30.100.5 *
> >    216.30.25.2 12 msec
> > *Aug  8 22:39:27.827: ICMP: time exceeded rcvd from 216.30.25.2 *
> >  4  *  *  *
> >
> > R4#ping 10.10.10.2
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
> > !!!!!
> > Success rate is 100 percent (5/5), round-trip min/avg/max = 24/24/24 ms
> > R4#
> >
> > R4#traceroute 10.10.10.2
> >
> > Type escape sequence to abort.
> > Tracing the route to 10.10.10.2
> >
> >  1 216.30.1.6 12 msec
> >    216.30.1.5 16 msec
> >    216.30.1.6 8 msec
> >  2 216.30.25.2 16 msec
> >    216.30.100.5 12 msec *
> > R4#
> >
> > R1#sh ip route 10.10.10.4
> > Routing entry for 10.10.10.4/32
> >  Known via "ospf 12", distance 110, metric 20
> >  Tag 85, type extern 2, forward metric 1
> >  Last update from 216.30.2.2 on FastEthernet0/0, 00:08:46 ago
> >  Routing Descriptor Blocks:
> >  * 216.30.2.2, from 10.10.10.2, 00:08:46 ago, via FastEthernet0/0
> >      Route metric is 20, traffic share count is 1
> >      Route tag 85
> >
> > R1#ping 10.10.10.4
> >
> > Type escape sequence to abort.
> > Sending 5, 100-byte ICMP Echos to 10.10.10.4, timeout is 2 seconds:
> > !!!!!
> > Success rate is 100 percent (5/5), round-trip min/avg/max = 24/25/28 ms
> > _______________________________________________
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> _______________________________________________
> For more information regarding industry leading CCIE Lab training, please 
> visit www.ipexpert.com
> 
> Are you a CCNP or CCIE and looking for a job? Check out 
> www.PlatinumPlacement.com
                                          
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