[ietf81-tech] An after-the-fact way to find interface trunk/access misconfigurations

[Bill Fenner]

http://management.meeting.ietf.org/netdisco/device.html?ip=130.129.1.23

currently says:

PortDuplex
(Link/Admin)NameSpeedNative
VLANVLAN
MembershipConnected
Devices...




GigabitEthernet0/5full/fulldefault1.0
Gbps11<http://management.meeting.ietf.org/netdisco/device_search.html?specific=vlan_dev&vlan=1>ap130.meeting.ietf.org
(GigabitEthernet0.1)<http://management.meeting.ietf.org/netdisco/device.html?ip=130.129.2.130&port=GigabitEthernet0.1>
This is the sign of a port configured as "access", not "trunk": "VLAN
Membership" should be "All":

PortDuplex
(Link/Admin)NameSpeedNative
VLANVLAN
MembershipConnected
Devices...





GigabitEthernet0/7full/fulldefault1.0 Gbps1Allap105.meeting.ietf.org
(GigabitEthernet0.1)<http://management.meeting.ietf.org/netdisco/device.html?ip=130.129.2.105&port=GigabitEthernet0.1>Sadly,
this info only appears once a port is up, meaning that this is only useful
after the fact.

It's not completely ridiculous to consider a script that tries to detect
this -- e.g., look for a port that says it has an AP attached to it but
doesn't have all VLANs.

  Bill
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