3-2
WAN Module Installation and User Guide
Configuring PPP and MLPPP
Typically, you would create a multilink group, configure the multilink group by adding
T1 or E1 ports and configuring PPP/MLPPP parameters, add the multilink group to a
VLAN, and finally, enable the multilink group.
For a T3 port, you would configure its PPP parameters and add it to a VLAN.
Multilink PPP and Multilink Groups
Each multilink PPP group is given a name, up to 16 characters in length. All named
components of the switch configuration must have unique names, so multilink groups
and VLANs cannot have identical names. See the ExtremeWare Software User Guide for
more information on allowable names for named components. Components are named
using the
create
command. Once a component is named, you do not need to use the
keyword for the component (see the shortcut below).
Create the multilink group using the following command:
create multilink <groupname>
Once the multilink group is created, assign ports to it. All T1/E1 ports must be added
as tagged ports. If the ports are configured as IPCP ports, then the tags will be stripped
as traffic passes over the link. BCP-configured ports will pass the tag across the link. See
the section “Encapsulation” for more information. Add ports by using the following
command:
config multilink <groupname> add ports <portlist> tag
or you can use the following shortcut:
config <groupname> add ports <portlist> tag
If the first port added to a multilink group is already configured for PPP, the multilink
group will inherit the configuration of the first port. Any other ports added to the link
will be configured to match the multilink configuration. The next section lists the
configuration commands for multilink groups and single PPP links.
Once the multilink group has been configured, it is added to a VLAN so that it can pass
traffic from the VLAN across the link. To add a multilink group to a VLAN, use the
following command:
config vlan <vlan> add multilink <groupname>