Pulling my hair out

mxsteve

I have 4 point to point T1 connections with cisco 1841 routers connecting to one cisco 2800 router. Everyone can communicate fine except: the 1841's cant ping 3 ip's on the class c network that is attatched to the 2800 router. They can ping all of the other ip's on the same subnet. There are no access lists involved. When I traceroute from a branch router to one of the IP's it stop's after the cisco 2800. Example from branch cisco 1841:

Tracing the route to xxx.xx.93.5

1 xxx.xxx.96.1 4 msec 4 msec 4 msec (this is the cisco 2800 interface)
2 * * *
3 * * *

Then I look at the Cisco 2800:

Tracing the route to (xxx.xxx.93.5)

1 xxx.xxx.93.5 0 msec 4 msec 0 msec (works fine)

---

try the same thing from branch cisco 1841 to another IP on same subnet:

Tracing the route to xxx.xxx.93.2

1 xxx.xxx.96.1 4 msec 4 msec 4 msec
2 xxx.xxx.93.2 4 msec 4 msec 4 msec


Anyone have any suggestions?

networker050184

What are you trying to ping? From the traceroute it looks to be good all the way up t the 2800, maybe the device just isn't responding or has a client firewall.

phoeneous

networker050184 wrote: »

maybe the device just isn't responding or has a client firewall.

Yeah, if they are XP boxes they might have the built-in firewall turned on which will prevent pings.

mxsteve

They are Win XP but I can ping them fine from the xxx.xxx.93.0/24 network. including the cisco 2800.

dtlokee

Do the windows XP machines have a single default gateway configured?

networker050184

dtlokee wrote: »

Do the windows XP machines have a single default gateway configured?

Yeah, sounds like an issue with only local subnet connectivity...

LBC90805

Remote into the 2800 router and do an extended ping with the three I.P. addresses you are trying to ping from the 1800's as the source I.P.s; see where that gets you! Especially if you cannot touch the XP machines with the enabled firewalls.