Juniper JUNOSE 11.1.X - LINK LAYER CONFIGURATION 4-7-2010, Configuration Manual

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IPv6, Multilink PPP, PPP, and PPPoE interfaces. The auto-configure command
identifies the encapsulation type. For flexibility, the router provides the ability to
configure an ATM 1483 subinterface with distinct profile assignments for each
encapsulation type supported by the
auto-configure command.
In contrast to dynamic ATM 1483 subinterfaces, dynamic VLAN subinterfaces support
recognition and creation of simultaneous IP and PPPoE upper dynamic interface
types. The
vlan auto-configure command identifies the encapsulation type. For
flexibility, the router provides the ability to configure a VLAN subinterface with distinct
profile assignments for each encapsulation type supported by the
vlan auto-configure
command.
Each profile typically contains configuration attributes for the expected encapsulation,
in addition to attributes for other higher-interface layers through IP. If your
configuration of upper layers is intended to be different depending on which incoming
encapsulation is received by the subinterface, configure and assign separate profiles
for each encapsulation type. If your configuration of upper layers is the same for
more than one encapsulation type, configure one profile and assign it for those
encapsulation types.
Profile Characteristics
Currently, profiles support bridged Ethernet, IP, IPv6, L2TP, Multilink PPP, PPP,
PPPoE, and VLANs. You create a profile with a specific set of characteristics. You
then assign the profile to multiple interfaces instead of creating separate interfaces
with identical attributes. After you create a profile, you can assign it to static
ATM 1483, static PPP, or static VLAN major interfaces on different devices.
Bridged Ethernet Characteristics
A profile can contain the following bridged Ethernet characteristic:
■
mtu—Sets the maximum allowable size, in bytes, of the maximum transmission
unit (MTU) for dynamic bridged Ethernet interfaces
IP Characteristics
A profile can contain one or more of the following IP characteristics:
■
access-routes—Enables the creation of host access routes on an interface
■
address—Configures an IP address on an interface
■
auto-configure ip-subscriber—Configures a primary IP interface to enable dynamic
creation of subscriber interfaces
■
auto-detect ip-subscriber—Enables packet detection on the router and specifies
that IP automatically detects packets that do not match any entries in the
demultiplexer table
■
directed-broadcast—Enables directed broadcast forwarding
■
filter-options all—Filters out packets that include IP options
■
igmp—Configures an IGMP interface
564 ■
Configuring a Dynamic Interface from a Profile
JUNOSe 11.1.x Link Layer Configuration Guide