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Shaping Rate Calculations

For shaping rate and WRR, the information included in the calculations varies by PIC type, as shown in Table 29.

Note: Gigabit Ethernet IQ2 PICs are unique in that they support ingress scheduling and shaping. The calculations shown for Gigabit Ethernet IQ2 PICs apply to both ingress and egress scheduling and shaping. For other PICs, the calculations apply to egress scheduling and shaping only.

For more information, see Shaping Input and Output Traffic on Ethernet IQ2 Interfaces.

Table 29: Shaping Rate and WRR Calculations by PIC Type

PIC Type	Platform	Shaping Rate and WRR Calculations Include
Gigabit Ethernet IQ2 PIC	All	For ingress and egress: L3 header + L2 header + frame check sequence (FCS)
Gigabit Ethernet IQ PIC	All	L3 header + L2 header + FCS
Non-IQ PIC	T-series and M320 with Enhanced FPC	L3 header + L2 header + 4-byte FCS + interpacket gap (IPG) + start-of-frame delimiter (SFD)+ preamble
	T-series with Nonenhanced FPC	L3 header
	Other M-series	L3 header+ L2 header
IQ PIC with a SONET/SDH interface	All	L3 header+ L2 header + FCS
Non-IQ PIC with a SONET/SDH interface	T-series and M320 with Enhanced FPC	L3 header +L2 header + 4-byte FCS + IPG + SFD + Preamble
	T-series with Nonenhanced FPC	L3 header
	Other M-series	L3 header+L2 header

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