Syslog Configuration with IPv4 Address
Logging is performed with IPv4 IP address and verified by logs on remote machine.
Topology
.
Figure 23-45: Syslog sample topology
Enabling rsyslog
#configure terminal | Enter configure mode. |
(config)#feature rsyslog [vrf management] | Enable feature on default or management VRF. By default this feature runs on the management VRF. |
(config)#commit | Commit the candidate configuration to the running configuration |
(config)#exit | Exit configure mode |
Logging to a File
The below configurations shows how to enable debug logs for a particular protocol. In this case, OSPF is shown.
#debug ospf all | This enables the debugging on OSPF. |
#configure terminal | Enter configure mode |
(config)#router ospf 1 | Enable OSPF process 1 |
(config-router)#exit | Exit router mode |
(config)#feature rsyslog | Enable feature on default or management VRF. By default this feature runs on the management VRF. |
(config)#logging level ospf 7 | This enable debug messages for OSPF module. This is configurable either if default of management VRF. |
(config)#logging logfile ospf1 7 | This creates the log file where the logs will be saved. The path of the file will be in the directory /log/ospf1. Log File size 4096-4194304 bytes. |
(config)#commit | Commit the candidate configuration to the running configuration |
(config)#exit | Exit configure mode |
To verify this, do some OSPF configuration and view the messages in the log file or with the show logging logfile command.
Validation
#show logging logfile
File logging : enabled File Name : /log/ospf1 Size : 419430400 Severity : (7)
2019 Jan 05 20:10:52.202 : OcNOS : OSPF : INFO : NSM Message Header
2019 Jan 05 20:10:52.202 : OcNOS : OSPF : INFO : VR ID: 0
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : VRF ID: 0
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : Message type: NSM_MSG_LINK_ADD
(5)
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : Message length: 232
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : Message ID: 0x00000000
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : NSM Interface
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : Interface index: 100001
2019 Jan 05 20:10:52.203 : OcNOS : OSPF : INFO : Name: po1
2019 Jan 05 20:10:52.204 : OcNOS : OSPF : INFO : Flags: 536875010
2019 Jan 05 20:10:52.204 : OcNOS : OSPF : INFO : Status: 0x00000804
2019 Jan 05 20:10:52.204 : OcNOS : OSPF : INFO : Metric: 1
2019 Jan 05 20:10:52.207 : OcNOS : OSPF : INFO : MTU: 1500
2019 Jan 05 20:10:52.207 : OcNOS : OSPF : INFO : Type: L3
2019 Jan 05 20:10:52.207 : OcNOS : OSPF : INFO : HW type: 9
2019 Jan 05 20:10:52.208 : OcNOS : OSPF : INFO : HW len: 6
2019 Jan 05 20:10:52.209 : OcNOS : OSPF : INFO : HW address: ecf4.bb5c.a2b0
2019 Jan 05 20:10:52.210 : OcNOS : OSPF : INFO : Bandwidth: 0.000000
2019 Jan 05 20:10:52.211 : OcNOS : OSPF : INFO : Interface lacp key flag 0
2019 Jan 05 20:10:52.212 : OcNOS : OSPF : INFO : Interface lacp aggregator upda
te flag 0
#show logging level
Facility Default Severity Current Session Severity
nsm 3 3
ripd 3 3
ospfd 3 7
ospf6d 3 3
isisd 3 3
hostpd 3 3
ldpd 2 2
rsvpd 2 2
mribd 2 2
pimd 2 2
authd 2 2
mstpd 2 2
imi 2 2
onmd 2 2
oamd 2 2
vlogd 2 2
vrrpd 2 2
ribd 2 2
bgpd 3 3
l2mribd 2 2
lagd 2 2
sflow 2 2
pservd 2 2
Logging to the Console
Note: For CMMD, Critical logs in the console are equivalent to Alert traps & Alert logs on the console is equivalent to critical trap in SNMP.
#configure terminal | Enter configure mode. |
(config)#logging level ospf 7 | This enable debug messages for OSFP module. |
(config)#logging console 7 | This enables the console logs. |
(config)#debug ospf | This enables the debugging on OSPF configurations. |
(config)#router ospf | Enabling ospf for process 1. |
(config-router)#exit | Exit router mode. |
(config)#commit | Commit the candidate configuration to the running configuration |
(config)#exit | Exit configure mode. |
To verify this, do some OSPF configuration and view the messages in the console.
Validation
#show logging console
Console logging : enabled Severity: (debugging)
#show logging level
Facility Default Severity Current Session Severity
nsm 3 3
ripd 3 3
ospfd 3 7
ospf6d 3 3
isisd 3 3
hostpd 3 3
ldpd 2 2
rsvpd 2 2
mribd 2 2
pimd 2 2
authd 2 2
mstpd 2 2
imi 2 2
onmd 2 2
oamd 2 2
vlogd 2 2
vrrpd 2 2
ribd 2 2
bgpd 3 3
l2mribd 2 2
lagd 2 2
sflow 2 2
pservd 2 2
Logging to Remote Server
#configure terminal | Enter configure mode. |
(config)#logging level bgp 7 | This enable debug messages for BGP module. |
(config)#logging remote server 10.16.2.1 vrf management | Redirects the log messages to the server configured. |
(config)#debug bgp all | This enables the debugging on BGP configurations. |
(config)#router bgp 1 | Enabling BGP process 1. |
(config-router)#exit | Exit router mode. |
(config)#commit | Commit the candidate configuration to the running configuration |
(config)#exit | Exit configure mode. |
Validation
#show logging server
Remote Servers:
10.16.2.1
severity: (debugging)
facility: local7
VRF: management
#show logging level
Facility Default Severity Current Session Severity
nsm 3 3
ripd 3 3
ospfd 3 3
ospf6d 3 3
isisd 3 3
hostpd 3 3
ldpd 2 2
rsvpd 2 2
mribd 2 2
pimd 2 2
authd 2 2
mstpd 2 2
imi 2 2
onmd 2 2
oamd 2 2
vlogd 2 2
vrrpd 2 2
ribd 2 2
bgpd 3 7
l2mribd 2 2
lagd 2 2
sflow 2 2
pservd 2 2
Last modified date: 10/19/2023