Stinger®
IP2000 Configuration Guide
7-1
7
Broadband RAS Configuration
With broadband remote access server (BRAS) support, a Stinger IP2000 can
terminate PPP over ATM (PPPoA) and PPP over Ethernet (PPPoE) sessions received
on a LIM DSL interface.
When a DSL interface receives PPPoA or PPPoE packet streams, the system switches
the inbound traffic to the LIM’s ATM internal interface on the basis of an ATM circuit
configuration. The IP2000 controller then uses IP routing to forward the packet
streams to the appropriate egress interface. For background information about ATM
circuit configurations, see the Stinger ATM Configuration Guide.
Note
PPPoA and PPPoE sessions are supported on DSL interfaces only, but are not
currently supported over T1/E1/IMA or IDSL ports. PPPoA and PPPoE are not
supported across trunk or Ethernet interfaces.
Recommended
call-type
setting for PPP sessions
The system assigns nailed group 1 to LIM slot 1 port 1 (
{ 1 1 1 }
), and also assigns
nailed group 1 to permanent, leased PPP connections. Because the default
call-type
in Stinger systems is nailed (
ft1
), a conflict occurs when you configure PPPoA or
PPPoE connections on any LIM interface, and {
1 1 1 }
is enabled.
Following are representative default settings showing the conflicting nailed group
assignments:
[in DS1-ATM/{ shelf-1 slot-1 1 }:line-config]
nailed-group = 1
[in CONNECTION/"":telco-options]
call-type = ft1
nailed-groups = 1
Note
Because these defaults conflict, setting the
call-type
value to
off
is
recommended for all PPP connections.
Recommended call-type setting for PPP sessions . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Required setup for PPPoA and PPPoE connections . . . . . . . . . . . . . . . . . . . . . . . 7-3
Optional configuration of a LIM ATM internal interface . . . . . . . . . . . . . . . . . . 7-10