NAME

App::Netdisco::Manual::Vendors - Tips and Tricks for Vendor Platforms

Neighbor Relations on Juniper EX

The LLDP configuration should look like:

 lldp {
   management-address 10.0.0.1;
   port-id-subtype interface-name;
   interface all;
 }

Report Cisco 37xx as Single Device Instead of Stacked

Add this to your 37xx config:

 no snmp-server sysobjectid type stack-oid

SNMPv3 Support on Cisco IOS

To access per-VLAN MAC address tables we use SNMPv3 contexts. In Cisco IOS the access control is per-context so for each context (VLAN) you need to permit access from the poller.

You should already have something like the following to enable SNMPv3 from Netdisco at 192.0.2.1:

 snmp-server view myv3view iso included
 snmp-server group myv3group v3 priv read myv3view
 snmp-server user myv3user myv3group v3 auth md5 PASSWORD priv des PASSWORD
 snmp-server host 192.0.2.1 version 3 auth myv3user

Then set the authorization:

 snmp-server group myv3group v3 auth
 snmp-server group myv3group v3 auth context vlan- match prefix

If the second command above is rejected, you have an older version of IOS and must enter a statement for each active VLAN on the device:

 snmp-server group myv3group v3 priv context vlan-1
 snmp-server group myv3group v3 priv context vlan-2
 snmp-server group myv3group v3 priv context vlan-3
 ... etc

Linux SNMP Service (Agent)

Install the snmpd (SNMP agent) and lldpd (neighbor discovery) packages.

Edit the /etc/snmp/snmpd.conf file:

 # AGENT BEHAVIOUR
 # comment out: agentAddress udp:127.0.0.1:161
 agentAddress udp:161,udp6:[::1]:161
 
 # ACCESS CONTROL
 rocommunity <your-secret> <management-device-IP/net>
 
 # SYSTEM INFORMATION
 sysServices 76
 # (default is 72, 74 is layer2 bridge/switch, 76 for layer3 router/gateway)

If running a firewall, allow SNMP traffic in on UDP port 161.

Edit the /etc/default/lldpd file:

 DAEMON_ARGS="-k -x -l -m <Mgmt-IP>"
 # <Mgmt-IP> is the IP to advertise for Netdisco to connect

Restart snmpd and lldpd services when you have configured them.

This assumes you're using LLDP on your network. If you use CDP then the lldpd daemon can support that protocol - see the manual page for details.