Example: Configuring Shaping Overhead on 10-Gigabit Ethernet LAN/WAN PICs
By default, the 10-Gigabit Ethernet LAN/WAN PIC uses 20 bytes as the shaping overhead. This includes 8 bytes preamble and 12 bytes interpacket gap (IPG) in shaper operations. To exclude this overhead, it should be configured as –20 bytes. The shaping overhead value can be set between 0 and 31 bytes, as shown in the following example. This range translates to a CLI range of –20 to 11 bytes for the shaping overhead configuration.
show chassis
fpc 6 {
pic 0 {
traffic-manager {
ingress-shaping-overhead –20;
egress-shaping-overhead –20;
}
}
}
Note:
When the configuration for the overhead bytes on a PIC are changed, the PIC is taken offline and then brought back online. In addition, the configuration in the CLI is on a per-PIC basis, and thus, applies to all the ports on the PIC.