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• Example: Configuring Filtering of Frames by Packet Loss Priority on page 101
Example: Configuring Filtering of Frames by Packet Loss Priority
To configure an MX Series router firewall filter to provide matching on the packet loss
priority (PLP) level carried in the frame, use the loss-priority or loss-priority-except match
condition. Packet loss priority matching is available for all protocols. For more detailed
information about configuring firewall filters and configuring filter match conditions for
Layer 2 bridging traffic on the MX Series routers, see the Junos OS Policy Framework
Configuration Guide.
NOTE: Layer 2 bridging is supported only on the MX Series routers. For more
information abouthowtoconfigure Layer2 bridging,seethe JunosOSNetwork
Interfaces Configuration Guide, the Junos OS Routing Protocols Configuration
Guide, and the Junos OS Feature Guide.
This example Layer 2 bridging firewall filter finds any incoming frames with a packet loss
priority (PLP) level of medium-high, and then classifies the packet in the
expedited-forwarding default forwarding class.
NOTE: This example does not present exhaustive configuration listings for
all routers in the figures. However, you can use this example with a broader
configuration strategy to complete the MX Series router network Ethernet
Operations, Administration, and Maintenance (OAM) configurations.
To configure filtering of frames by packet loss priority:
1.
Configure the firewall filter filter-plp-configure-forwarding:
[edit firewall]
family bridge {
filter filter-plp-configure-forwarding {
term 0 {
from {
loss-priority medium-high;
}
then forwarding-class expedited-forwarding;
}
}
}
2.
Configure a Layer 2 bridging domain bd for the ge-0/0/0 interface (that has already
been configured at the [edit interfaces] hierarchy level):
[edit bridge-domains]
bd {
domain-type bridge {
interface ge-0/0/0;
}
101Copyright © 2010, Juniper Networks, Inc.
Chapter 9: Layer 2 Firewall Filters