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

Page: 502 / 774

■
Gigabit Ethernet interfaces
■
10-Gigabit Ethernet interfaces
■
VLAN subinterfaces over Fast Ethernet, Gigabit Ethernet, 10-Gigabit Ethernet, or
bridged Ethernet interfaces
For sample configurations that include bridge interfaces, see “Configuration Examples”
on page 488. For information about configuring Ethernet, ATM, and bridged Ethernet
interfaces, see:
■
“Configuring ATM” on page 3
■
“Configuring VLAN and S-VLAN Subinterfaces” on page 169
■
“Configuring Bridged Ethernet” on page 443
■
Chapter Configuring Ethernet Interfaces in JUNOSe Physical Layer Configuration
Guide
Subscriber Policies
To enable intelligent flooding of packets within a bridge group’s broadcast domain,
each bridge group interface you create is associated with a default subscriber policy.
A
subscriber policy is a set of forwarding and filtering rules that defines how the
bridge group interface handles various packet or attribute types, as follows:
■
For each packet type, the subscriber policy specifies whether you want the bridge
group interface to permit (forward) or deny (filter or drop) packets of that type.
■
For the relearn attribute, the subscriber policy specifies whether the bridge
interface can relearn a MAC address entry on a different interface from the one
initially associated with this entry in the forwarding table. Permit indicates that
relearning is allowed, and deny indicates that relearning is prohibited.
The router provides two default subscriber policies: default Subscriber for subscriber
(client) bridge interfaces, and default Trunk for trunk (server) bridge interfaces.
Table 26 on page 470 lists the default values for each packet or attribute type defined
in the default Subscriber and default Trunk policies. The only difference between the
two policies is how broadcast packets and packets with unknown unicast destination
addresses (DAs) are handled.
Table 26: Default Subscriber Policies for Bridge Group Interfaces
Default Trunk Policy Default Subscriber Policy Packet/Attribute Type
Permit Permit ARP
Permit Deny Broadcast
Permit Permit IP
Permit Permit MPLS
Permit Permit Multicast
470 ■
Overview
JUNOSe 11.1.x Link Layer Configuration Guide