Juniper-networks JUNOS OS 10.4 Instrukcja Użytkownika Pobierz pdf (Strona 126)

Example: Configuring Filtering of Frames by IEEE 802.1p Bits

For the bridge and vpls protocol families only, MX Series router firewall filters can be

configured to provide matching on IEEE 802.1p priority bits in packets with VLAN tagging:

•

To configure a firewall filter term that includes matching on IEEE 802.1p learned VLAN

priority (in the outer VLAN tag), use the learn-vlan-1p-priority or

learn-vlan-1p-priority-except match condition.

•

To configure a firewall filter term that includes matching on IEEE 802.1p user priority

(in the inner VLAN tag), use the user-vlan-1p-priority or user-vlan-1p-priority-except

match condition.

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 Routing

Policy Configuration Guide.

NOTE: Layer 2 bridging is supported only on the MX Series routers. For more

information about how to configure Layer 2 bridging, see the Routing Policy

Configuration Guide, the Junos OS Routing Protocols Configuration Guide,

and the Junos OS Feature Guides.

This example Layer 2 bridging firewall filter finds any incoming frames with an IEEE 802.1p

learned VLAN priority level of either 1 or 2, and then classifies the packet in the best-effort

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 IEEE 802.1p bits:

Configure the firewall filter filter-learn-vlan-configure-forwarding:

[edit firewall]

family bridge {

filter filter-learn-vlan-configure-forwarding {

term 0 {

from {

learn-vlan-1p-priority [1 2];

}

then forwarding-class best-effort;

}

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