Celebrate National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Switch - Not showing up on solarwinds

Posted on 2016-08-15
13
Medium Priority
?
111 Views
Last Modified: 2016-08-19
One of the switches at a building I deal with is no longer communicating with SolarWInds, I compared it to configuration of another switch and see nothing different.

I  typed "show ip route" command and noticed the following, please see screenshot

Please see attached files:
10.0.10.24 - Server which has Solarwinds Installed
10.0.10.8 - Domain Controller
10.5.0.25 - Domain Controller
192.168.123.1 (MX64 Router - DG)
192.168.123.2 (Cisco Router-For Voice/Corp Lan)

I can't figure out why the switch is referencing 10.0.10.24 (Solarwinds Server) and no "seeing" the Default Gateway of 192.168.123.1

Any thoughts would be appreciated.
SwitchWorking.JPG
SwitchNotWorking.JPG
0
Comment
Question by:Tim OBrien
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 6
  • 3
  • 2
  • +2
13 Comments
 
LVL 31

Assisted Solution

by:Predrag
Predrag earned 332 total points
ID: 41757930
What is output (from both switches) :
#sh ip int brief
# sh interf trunk

Also topology and sanitized configuration could help.
0
 
LVL 57

Assisted Solution

by:giltjr
giltjr earned 332 total points
ID: 41757942
If I understand what your are saying, you need to look at the router 192.168.123.1 and see if it has a route to 10.0.10.24.

My guess is that the router 192.168.123.1 has a route to 10.0.10.24, that points to 192.168.123.2 and so 192.168.123.1 sends a ICMP redirect to the switch saying use 192.168.123.2 to get to 10.0.10.24.
0
 
LVL 22

Expert Comment

by:eeRoot
ID: 41758688
Can the SolarWinds server ping the switch?  And can the switch ping the SolarWinds server?
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 

Author Comment

by:Tim OBrien
ID: 41759946
The switch can not ping the Solarwinds server and Solarwinds server can not ping the switch.

There are a total of 6 other switches all which work fine and suddenly one day the switch no longer "communicated" with the Solarwinds server.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 41759949
Did you look at the router with the IP address of 192.168.123.1?  Does it have a route that could include the IP address 10.0.10.24 that goes to the wrong place?
1
 

Author Comment

by:Tim OBrien
ID: 41759978
I can ping the switch from all other servers with the exception of the solarwinds server.
0
 

Author Comment

by:Tim OBrien
ID: 41760166
For some reason the switch thinks its default gateway is 192.168.123.2, do I need to do some kind of clear command?

Couple months ago the Meraki MX64 (192.168.123.1) replaced the 6500 Series Cisco Router (192.168.123.2)  as the Default Gateway and it looks like the switch still references it for some reason.
0
 
LVL 22

Assisted Solution

by:eeRoot
eeRoot earned 332 total points
ID: 41760407
Check the default gateway and VLAN 1 settings on the working switches.  It sounds like you have two subnets in VLAN 1, so you need to verify the IP address and subnet info along withthe default gateway.  Subnets would be defined on the interfaces of the router serving as the default gateway, so the switches need to match the router's settings.
0
 
LVL 57

Expert Comment

by:giltjr
ID: 41761095
On the switch that is not working you need to look at the running configuration and the startup configuration to see if they match.

It looks like one, if not both, have a static route defined that points to 192.168.123.2.
1
 

Author Comment

by:Tim OBrien
ID: 41761102
Thanks I'll review both and post the running config shortly.
0
 
LVL 5

Accepted Solution

by:
Leon Adato earned 1004 total points
ID: 41762779
Because even ping isn't working, this is almost guarenteed to be a routing issue. And I agree with other posters that the gateway is your smoking gun.

Of course, you might also have an ACL somewhere along the way that is blocking.

If you verify that the default gateway is, in fact, correct then some other things to try include:

Step 1: Try Traceroute from the switch to the SolarWinds server. See how far you get (or if you get anywhere.

Step 2: Starting with the solarwinds server, work your way "across" the network toward the switch and try to ping the switch. So if there are 3 routers in between the SW server and the switch (conveniently named R1, R2, and R3 in my world), you start by SSH-ing to R1 and pinging the switch. No worky? SSH to R2 and try again.

Wherever you are SUCCESSFUL, that's the device which could be blocking the path.

Once you have ping working, make sure SNMP is also working. You can see some commands to do that manually in this video https://www.youtube.com/watch?v=-8xPLCIuQzE
 (jump to 7:24 time marker for command syntax.)

(Shameless plug: SolarWinds Lab - as well as the yearly free online conference THWACKcamp are great places to learn how to do a TON of cool things)

Hope that helps.
1
 

Author Comment

by:Tim OBrien
ID: 41762836
Thanks, I'm off to vacation so can't do much in the next week. Going to close case and use all your helpful suggestions. Appreciate all the help!
0
 

Author Closing Comment

by:Tim OBrien
ID: 41762847
Thanks all for your help. Much appreciated
1

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

This article explains the fundamentals of industrial networking which ultimately is the backbone network which is providing communications for process devices like robots and other not so interesting stuff.
This month, Experts Exchange’s free Course of the Month is focused on CompTIA IT Fundamentals.
Get a first impression of how PRTG looks and learn how it works.   This video is a short introduction to PRTG, as an initial overview or as a quick start for new PRTG users.
If you're a developer or IT admin, you’re probably tasked with managing multiple websites, servers, applications, and levels of security on a daily basis. While this can be extremely time consuming, it can also be frustrating when systems aren't wor…

730 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