how to configure snmp host when the snmp server is in one VRF?

[println]

how to configure snmp host when the snmp server address is in one VRF? Is it support? Thank you.

[Michael_Morey]

I believe what you are looking for is Context Mapping:

For V3, you simply map a Context to a VRF:

code:

device (Config)# snmp-server context context-name vrf vrf-name

For V1/V2c, in addition to the Context to VRF association, you create a community map in order to map the Context to a Community name:

code:

device (Config)# snmp-server mib community-map community-name context context-name

Now whenever you create a host using the set context or community name, traps will be sent on that VRF.

A full explanation can be found in the NI 6.0 Management Guide (starting on page 214)

[Sargis_Minasyan]

Trying a better formatting

code:

vrf mgmt-vrf
 rd 1:1
 address-family ipv4
 ip route 0.0.0.0/0 10.1.1.1
 exit-address-family

management-vrf mgmt-vrf

interface management 1
 vrf for mgmt-vrf
 ip address 10.1.1.2/24
 enable

Many thanks,
Sargis

[Sargis_Minasyan]

I don't think that's supported, but you could configure a specific VRF as management VRF, which will possibly switch SNMP to that VRF (together with some other mgmt services). A sample config for that would be:

code:

vrf mgmt-vrf

code:

 rd 1:1

code:

 address-family ipv4

code:

 ip route 0.0.0.0/0 10.1.1.1 

code:

 exit-address-family

code:

management-vrf mgmt-vrf

code:

interface management 1

code:

 vrf for mgmt-vrf

code:

 ip address 10.1.1.2/24

code:

 enable

Many thanks,
Sargis

[println]

Hi Sargis,
Sorry I forgot to mention I'm using MLX,Looks like the Netlron OS is different from NOS. But didn't find the command for MLX.

MLX(config)#snmp-server host 1.1.1.1 ?
version SNMP version or security model

MLX(config)#snmp-server host 1.1.1.1 v
version SNMP version or security model
MLX(config)#snmp-server host 1.1.1.1 version ?
v1 SNMP version or security model 1
v2c SNMP version or security model 2
v3 SNMP version or security model 3
MLX(config)#snmp-server host 1.1.1.1 version v3 ?
auth SNMP v3 security level 2 or authentication
noauth SNMP v3 security level 1 or none
priv SNMP v3 security level 3 or authentication & privacy





MLX(config)#vrf ?
ASCII string Name of VRF (up to 255 characters)
MLX(config)#vrf test
MLX(config-vrf-test)#?
address-family Enter Address Family command mode
clear Clear table/statistics/keys
cls Clear screen
end End Configuration level and go to Privileged
level
exit Exit current level
exit-address-family Exit Address Family command mode
exit-vrf Exit IP VRF mode
ip VRF specific IP commands
no Undo/disable commands
quit Exit to User level
rd Configure Route Distinguisher
route-target Configure Target VPN Extended Communities
show Display system information
write Write running configuration to flash or terminal

MLX(config-vrf-test)#

[Sargis_Minasyan]

Does the below config work for you:

rb3(config)# rb 3
rb3(config-rbridge-id-3)# vrf TEST
rb3(config-vrf-TEST)# exit
rb3(config-rbridge-id-3)# exit
rb3(config)# snmp-server host 10.1.1.1 public use-vrf TEST ?
Possible completions:
severity-level Severity level associated with traps
source-interface Interface IP address to be used as a source address for Traps
udp-port Port number used to send traps.
version Version used to send traps.

rb3(config)# snmp-server host 10.1.1.1 public use-vrf TEST
rb3(config-host-10.1.1.1/public)#

The example is for NOS, for SLX-OS VRF will be created globally rather than at RB level. Also "v3host" is used instead of "host", if the server is using SNMP v3 for authorization/encryption.

Many thanks,
Sargis