egress-shaping-overhead
Syntax
egress-shaping-overhead number;
Hierarchy Level
[edit chassis fpc slot-number pic pic-number traffic-manager], [edit chassis lcc number fpc slot-number pic pic-number traffic-manager]
Description
Number of bytes to add to packet to determine shaped session packet length.
On M Series and T Series routers with Gigabit Ethernet Intelligent
Queuing 2 (IQ2) PICs and Enhanced IQ2 (IQ2E) PICs and on MX Series
routers with Dense Port Concentrators (DPCs) only, to account for
egress shaping overhead bytes added to output traffic on the line
card, you must use the egress-policer-overhead statement
to explicitly configure corresponding egress policing overhead for
Layer 2 policers, MAC policers, or queue rate limits applied
to output traffic on the line card.
For
MIC and MPC interfaces on MX Series routers, by default the value
of egress-shaping-overhead is configured to 20, which means
that the number of class-of-service (CoS) shaping overhead bytes to
be added to the packets is 20. The interfaces on DPCs in MX Series
routers, the default value is zero. For interfaces on PICs other than
the 10-port 10-Gigabit Oversubscribed Ethernet (OSE) Type 4, you should
configure egress-shaping-overhead to a minimum of 20 bytes
to add a shaping overhead of 20 bytes to the packets.
When you change the egress-shaping-overhead value,
on M Series, T Series, and MX104 routers the PIC on which it is changed
is restarted. On MX5 routers, the MIC on which it is changed is restarted.
On other MX Series routers, the DPC/MPC on which it is changed is
restarted.
Options
number—When traffic management
(queuing and scheduling) is configured on the egress side, the number
of CoS shaping overhead bytes to add to the packets on the egress
interface.
Range:
-
–63 through 192.
-
–62 through 192 for vSRX Virtual Firewall.
The L2 headers (DA/SA + VLAN tags) are automatically a part of the shaping calculation.
Required Privilege Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Release Information
Statement introduced in Junos OS Release 8.3.