?
Solved

Can't ping lan from router

Posted on 2012-03-09
5
Medium Priority
?
698 Views
Last Modified: 2012-03-12
I have a cisco 2811 router that has a t1 connection.  I can ping the vlan IP address of 192.168.21.1 from my location fine.  The issue arrises when I try to ping backwards from the 192 network back to my network without having to specify the interface to ping from.  

Is there a way I can specify the interface to take when reaching other lan networks, without having to specify that every time?
0
Comment
Question by:sstire
  • 3
  • 2
5 Comments
 
LVL 25

Expert Comment

by:Ken Boone
ID: 37702930
yes type the following:

ping x.x.x.x source y.y.y.y

where x.x.x.x is the dest and y.y.y.y is the source ip that you want to ping from.

By default the router will use the ip address of the outbound interface for the source ip address of a packet that is generated by the router.
0
 

Author Comment

by:sstire
ID: 37703024
Correct, that's how I have to do it right now.  Which sucks when I try to do any ftp from the router to back up configs etc, because the default outbound interface is the public serial IP  interface.
0
 
LVL 25

Accepted Solution

by:
Ken Boone earned 2000 total points
ID: 37703100
Use the ip ftp source-interface command
or
ip tftp source-interface command to fix that problem.
0
 

Author Comment

by:sstire
ID: 37709398
Ken-that seams to have fixed the FTP problem now:)  Thank you, also is there a way to take that one step further so that all traffic originates from the vlan interface instead of from the serial interface?
0
 
LVL 25

Assisted Solution

by:Ken Boone
Ken Boone earned 2000 total points
ID: 37709984
nope
There are other things you can specify the source address for though.

snmp and ntp are two others I can think of off the top of my head.

There is no global blanket that covers everything though.
0

Featured Post

Concerto Cloud for Software Providers & ISVs

Can Concerto Cloud Services help you focus on evolving your application offerings, while delivering the best cloud experience to your customers? From DevOps to revenue models and customer support, the answer is yes!

Learn how Concerto can help you.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

I have seen some questions on problems with SSH/telnet access to Cisco routers that may occur despite the fact that from a PC connected to your LAN, Internet connectivity is in place and users can access Internet sites without any issues.  There are…
The Cisco RV042 router is a popular small network interfacing device that is often used as an internet gateway. Network administrators need to get at the management interface to make settings, change passwords, etc. This access is generally done usi…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

864 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question