EtherChannel, LACP, and PAgP

EtherChannel groups physical links into a logical bundle. netverdict models bundle membership, selected/unselected member state, and LACP/PAgP-style compatibility checks.

Support level

Area	Level	Notes
Static EtherChannel	Supported	Compatible members form a bundle.
LACP	Behaviour model	Active/passive negotiation and member selection.
PAgP	Behaviour model	Desirable/auto style compatibility where implemented.
Load balancing	Partial	Bundle forwarding is represented; exact hashing is not hardware-accurate.

Standards coverage

Standard	Coverage	Notes
IEEE 802.1AX	Behaviour model	LACP compatibility and aggregation concepts.

Feature matrix

Feature	Status	Notes
channel-group <n> mode on	Supported	Static bundle.
mode active/passive	Supported	LACP bundle intent.
mode desirable/auto	Partial	PAgP-style support.
Member compatibility	Supported	Speed/VLAN/trunk compatibility checks where modelled.
Port-channel interface	Supported	Logical forwarding interface.
Suspended members	Supported	Incompatible members stay out of the bundle.

Vendor command matrix

Command	IOS-style	Junos-style	VyOS-style	Notes
channel-group 1 mode active	Supported	n/a	Partial	LACP member config.
interface Port-channel1	Supported	Partial	Partial	Bundle interface.
show etherchannel summary	Supported	Partial	Partial	Bundle/member state.
show lacp neighbor	Supported	Partial	Partial	LACP view.

Behaviour notes

Bundle state is deterministic. If two members differ in VLAN/trunk settings, the engine keeps the incompatible member out instead of hiding the mismatch.

Examples

Canonical example

configure terminal
interface range GigabitEthernet0/1-2
 channel-group 1 mode active
interface Port-channel1
 switchport mode trunk
end
show etherchannel summary

Vendor styles

IOS-style

interface range GigabitEthernet0/1-2
 channel-group 1 mode active
interface Port-channel1
 switchport mode trunk

Junos-style

set chassis aggregated-devices ethernet device-count 1
set interfaces ge-0/0/1 ether-options 802.3ad ae0
set interfaces ae0 aggregated-ether-options lacp active

VyOS-style

set interfaces bonding bond0 mode 802.3ad
set interfaces bonding bond0 member interface eth1
set interfaces bonding bond0 member interface eth2

Known limits

Hardware load-balance hashing, LACPDU byte fidelity, min-links timing quirks, and vendor-specific suspend messages are simplified.