06-06-2008 01:09 AM - edited 03-03-2019 10:15 PM
Hi,
I have two IP's Configured on my Cisco 2800. 1.1.1.1 - Loopback and 2.2.2.2 on Fast Ethernet. Both IP's are pingable across the WAN. And telnet to loopback IP is working fine. However I am unable to telnet to Fast Ethernet IP. The error message while trying to telnet to Fast Ethernet IP is: "Could not open connection to the host, on port 23: Connect failed". I tried to debug telnet on the router. The Debug output for unsuccessful telnet is as follows:
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Telnet194: recv SB NAWS 139 24
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However for a successful telnet session, the output is:
Telnet195: 1 1 251 1
TCP195: Telnet sent WILL ECHO (1)
Telnet195: 2 2 251 3
TCP195: Telnet sent WILL SUPPRESS-GA (3)
Telnet195: 80000 80000 253 24
TCP195: Telnet sent DO TTY-TYPE (24)
Telnet195: 10000000 10000000 253 31
TCP195: Telnet sent DO WINDOW-SIZE (31)
TCP195: Telnet received DO ECHO (1)
TCP195: Telnet received DO SUPPRESS-GA (3)
TCP195: Telnet received WILL TTY-TYPE (24)
Telnet195: Sent SB 24 1
TCP195: Telnet received WILL WINDOW-SIZE (31)
Telnet195: recv SB NAWS 110 52
Telnet195: recv SB 24 0 ANSI
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There are no ACL's or firewalls involved in the picture.
_______________________________________
06-06-2008 03:43 AM
Sharad
You have posted this same question on the LAN Switching and Routing forum where I suggested that you post the router config.
HTH
Rick
06-06-2008 04:59 AM
try to config the int with below and check.
- conf t
- interface Fast Ethernet
- ip tcp adjust-mss 1200
Hope this helps
Regards,
Pravin
06-10-2008 01:50 AM
Hi Pravin,
It Does not help :(
06-10-2008 01:47 AM
Hi,
The Interface Config is:
interface FastEthernet0
ip address 2.2.2.2 255.255.255.0
ip route-cache flow
ip policy route-map XYZ
speed 100
full-duplex
end
06-10-2008 01:54 AM
You have a route MAP - whats that allowing ???
06-10-2008 02:07 AM
That is to divert traffic from and to specific subnets to the second WAN Link.
However even when i gave a :Permit IP any any" in Route Map's ACL, the telnet session was not established.
06-10-2008 05:10 AM
Hi Sharad,
I'm sure there is some config entry that is making the telnet not possible.
We shall request you to paste the config (you may take out all sensitive info) as that will make it much easier to diagnose.
Regards,
Wilson Samuel
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