Cisco Systems 8600 Series manual VBR.2

Traffic Policing Examples

Figure 7-17shows a VBR.2 connection policing example, with policing = 2, and both buckets compliant. Leaky bucket two is policing the CLP(0) cell stream for conformance with maximum burst size MBS (as specified by BT), and for compliance with the SCR sustained cell rate.

Figure 7-17 VBR.2 Connection, Policing = 2, with Buckets 1 and 2 Compliant

Connection setup

and compliance status:

VBR.2
Policing = 2
Bkt 1 depth < CDVT(0+1)
Bkt 2 depth < BT + CDVT
5	4	3	2	1
CLP=1	CLP=0	CLP=1	CLP=0	CLP=0
			5	3	CLP(1) cells compliant with Leaky Bkt 1, admit to network
			CLP=1	CLP=1
Time				4	2	1	4	2	1
				CLP=0	CLP=0	CLP=0	CLP=0	CLP=0	CLP=0
interval
variations	+			CLP(0) cells				CLP(0) cells
CDVT(0+1)				compliant with			+	compliant
Leaky Bkt 1				Leaky Bkt 1,	BT+ CDVT			with Leaky Bkt 2,
				applied to				admit to network
					Leaky Bkt 2
PCR(0+1)				Leaky Bkt 2

SCR

Discard non-compliant CLP(0) cells

S6347

ATM Connections 7-31