User guide

Managing Automatic Remote Configuration Download DHCP Client Auto-Configuration Process

OmniSwitch 6250/6450 Switch Management Guide May 2012 page 8-17

LACP auto detection is enabled by default and operates only on the combo ports and uplink ports on

OmniSwitch during the Automatic Remote Configuration stage.

1 When an OmniSwitch detects LACP PDUs from a remote peer connected through a combo or an

uplink port, it configures that port as a LACP port and starts LACP handshake with the peer device.

2 The newly formed LACP port is made a member of VLAN 127 and VLAN 1 and DHCP packets are

sent out through this LACP port.

3 Once the remote configuration download is complete on this LACP port, the switch configuration file

can automatically configure the required ports for the link aggregate.

4 After the process is completed, this automatic link aggregate and related associations are deleted.

Note. The LACP auto detection mode is not supported when the switch boots up in normal mode

(non-remote configuration load mode). The LACP configuration at the peer device must not be changed

once the automatic link aggregate is created using the parameters in the LACP PDU sent from the peer

device.

DHCP Client Auto-Configuration Process

The automatic remote configuration download feature supports three DHCP client configuration methods

to obtain an initial dynamic IP address from the DHCP server:

• Static DHCP client on untagged VLAN 1

• Dynamic DHCP client on tagged VLAN 127

• Dynamic DHCP client on LLDP tagged management VLAN

Note. Some Metro networks use a fixed tagged VLAN 127 for initial IP assignment. The

auto-configuration of Dynamic DHCP client on LLDP tagged management VLAN facilitates the

installation of OmniSwitch in such networks.

OmniSwitch creates a DHCP Client interface on:

• the default untagged VLAN 1 and then on tagged VLAN 127 alternatively

• the Management VLAN being advertised in the LLDP PDUs sent by the Management Switch

configured in Nearest-Edge Mode.

See the “Nearest-Edge Mode Operation” on page 8-20 for additional information.

Note. OmniSwitch must have at least one port with connectivity to the DHCP server through

Management VLAN.