Cisco Syslog setup - Send to syslog server

I have set up my cisco to send the syslog to a syslog server, but it is showing link down on that ip address for the server.

Has anyone done this and know why it is showing link down?

Below is the configuration.

Console logging: level debugging, 991 messages logged, xml disabled,
                     filtering disabled
    Monitor logging: level debugging, 0 messages logged, xml disabled,
                     filtering disabled
    Buffer logging:  level warnings, 757 messages logged, xml disabled,
                    filtering disabled
    Exception Logging: size (4096 bytes)
    Count and timestamp logging messages: disabled
    Persistent logging: disabled
    Trap logging: level warnings, 1034 message lines logged
        Logging to x.x.x.x  (tcp port 515, audit disabled,
              link down),
              0 message lines logged,
              0 message lines rate-limited,
              0 message lines dropped-by-MD,
              xml disabled, sequence number disabled
              filtering disabled
        Logging to x.x.x.x  (tcp port 514, audit disabled,
              link down),
              0 message lines logged,
              0 message lines rate-limited,
              0 message lines dropped-by-MD,
              xml disabled, sequence number disabled
              filtering disabled
        Logging Source-Interface:       VRF Name:
        GigabitEthernet0/1
LVL 1
considerscsAsked:
Who is Participating?
 
max_the_kingConnect With a Mentor Commented:
hi considerscs,
i believe you should use udp port for syslogging cisco devices (unless you want to write some C programs to adjust log format ...).
Then please:
1) check that your syslog server is listening on an udp port (be sure which one is - usually it is udp port 514, try and use that one)
2) remove your log host from cisco device configuration (no loggin host ...)
3) add up your loggin host again to cisco device configuration (loggin host ...)
4) test if it is successful

hope this helps
max
0
 
max_the_kingCommented:
Hi,
because it may not succeed in opening the socket on tcp port 514 (e.g.: the syslog server may not be listening on that port).
It is usually easier to let logs flow through udp port 514

hope this helps
max
0
 
Ernie BeekExpertCommented:
So the server is reachable, syslog service is running and listening on those ports (normally it's using UDP)?
0
Prepare for an Exciting Career in Cybersecurity

Help prevent cyber-threats and provide solutions to safeguard our global digital economy. Earn your MS in Cybersecurity. WGU’s MSCSIA degree program curriculum features two internationally recognized certifications from the EC-Council at no additional time or cost.

 
considerscsAuthor Commented:
server is reachable (though it is a third party vendors server) but even on udp port it is still not showing as link up.

Logging to x.x.x.x  (udp port 515, audit disabled,
              link down),
              0 message lines logged,
              0 message lines rate-limited,
              0 message lines dropped-by-MD,
              xml disabled, sequence number disabled
              filtering disabled
        Logging Source-Interface:       VRF Name:
        GigabitEthernet0/1
0
 
max_the_kingCommented:
there may be some mess on the sockets ... it might fix with a reload

please have a look at the following, it seems a very similar issue

https://supportforums.cisco.com/thread/1004039

hope this helps
max
0
 
Ernie BeekExpertCommented:
So are you able to check the server to see if everything is up and running there? Also no firewall blocking anything?
And are you sure the server is listening on port 515? Like max said, normally syslog uses UDP port 514.
0
 
considerscsAuthor Commented:
I have it set up for udp port 514 and 515, but the server is controlled by a third party vendor.  This is all they do is run the syslog servers.

I will try the reload after hours when I am able to reload and see if that brings this up.
0
 
considerscsAuthor Commented:
the reboot did not work, they are all still showing down.
0
 
Ernie BeekExpertCommented:
I think you might also want to check with the 3rd party vendor and let them check if everything is ok.
If you set up another device to send syslogs to the server, does that come through?
0
 
considerscsAuthor Commented:
This came up after doing this.
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.