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Example: Configuring Shaping Overhead on 10-port 10-Gigabit Oversubscribed Ethernet PICs

By default, the 10-port 10-Gigabit OSE 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.

Published: 2010-04-15

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