gns3-registry/docker/ovs-snmp

Docker Open vSwitch with SNMP for GNS3

Inspired by gns3/openvswitch This are sources for docker image for a configurable Open vSwitch with SNMP and LLDP support.

By default, all ports will be added to br0. To have eth0 as dedicated mgmt. interface see below.

Use case examples: - SNMP enabled switch - test NMS / SNMP topology detection

Software

Based on alpine:latest with additional net-snmp and lldpd packets installed.

SNMP agent will listen on all interfaces, read-only community is 'public' LLDP agent is integrated with snmpd.

Both agents can be switched on or off by the respective environment variables.

Environment variables

Set the following variables to either 1 or 0 to start or not start the corresponding protocols / daemons: LLDP, SNMP, RSTP default 1

Dedicated management interface

If MANAGEMENT_INTERFACE=1 eth0 will not be added to br0 and needs to be configured as usual.

Number of bridges

By default one bridge (br0) is created and all interfaces are added. To create more bridges set NUM_BR=n (default n=1). Configuration of those additional bridges needs to be done manually.

RSTP

By default RSTP will be enabled (RSTP=1). Use RSTP_ROOT to set bridge priority. 1 for primary root, 2 for secondary root bridge.

LLDP

Use LLDP_CHASSIS_ID=someName to configure chassis id.

LLDP_PID_TYPE={ifname | mac} configure the port id subtype e.g. what is used as port id. For even more LLDP config, you can connect to a running container and edit /etc/lldpd.d/lldpd.conf (the folder is added as docker volume for persistence).

Helpers

/bin/rstp is a wrapper for ovs-vsctl. Usage: rstp command [bridge] status show status enable enable RSTP disable disable RSTP and forward BPDU primary configure bridge as primary root secondary configure bridge as secondary root

By default br0 will be used.

Building the container

docker build -t gns3/ovs-snmp .