Juniper JUNOS OS 10.4 - RELEASE NOTES Release Note page 12

JUNOS OS 10.4 Release Notes
12
To configure the PIC forwarding mode, include the
its options at the
[edit chassis fpc number pic number]
[Network Interfaces]
New control queue disable feature (T Series routers with 10-Gigabit Ethernet PIC
with oversubscription)—Provides a new CLI statement for disabling the control queue
feature for the 10-Gigabit Ethernet PIC with oversubscription. To disable the control
queue, use the
no-pre-classifier
When the no-pre-classifier
for all ports on that 10-Gigabit Ethernet PIC with oversubscription. Deleting this
configuration results in the control queue feature being re-enabled on all the ports of
that PIC.
[edit chassis]
fpc 2 {
pic 0 {
no-pre-classifier;
}
}
NOTE:
This feature is applicable in both oversubscribed and line-rate modes.
1.
The control queue feature is enabled by default in both oversubscribed
2.
and line-rate modes, which can be overridden by the user configuration.
CLI show commands remain unchanged. When the control queue is
3.
disabled, various show queue commands continue to show the control
queue in the output. However, all control queue counters are reported
as zeros.
Enabling or disabling the control queue feature results in the PIC being
4.
bounced (offline/online).
Once the control queue feature is disabled, then the Layer 2 and Layer 3 control packets
are subject to queue selection based on the BA classification. However, the following
control protocol packets are not classified using BA classification, as they might not
have a VLAN, MPLS, or IP header:
Untagged ARP packets
Untagged Layer 2 control packets such as LACP or Ethernet OAM
Untagged IS-IS packets
When the control queue feature is disabled, untagged ARP/IS-IS and other untagged
Layer 2 control packets will go to the restricted queue corresponding to the forwarding
class associated with queue 0.
[Network Interfaces]
forwarding-mode
statement at the
[chassis]
statement is set, the control queue feature will be disabled
Copyright © 2010, Juniper Networks, Inc.
statement and
hierarchy level.
hierarchy level.