EMULATING NETWORK TRAFFIC SHAPING
A system, method, and computer-readable medium for emulating traffic shaping. The method includes pre-coloring a packet to provide a pre-colored packet. The pre-colored packet is policed to provide a policed packet. In an example embodiment, the pre-coloring of the packet is performed based on (i) a meterstate and (ii) a true color of the packet. In a further example embodiment, a connection identifier associated with the packet is retrieved from a header of the packet and the connection identifier is correlated with the meterstate. In another example embodiment, the policed packet is marked with a true color of the packet, to provide a marked packet and the marked packet is discarded or forwarded, based on the policed packet.
1 . A system for emulating traffic shaping, the system comprising:
a network processor configured to pre-color a packet to provide a pre-colored packet, and police the pre-colored packet to provide a policed packet.
2 . The system of claim 1 , wherein the network processor is configured to pre-color the packet based on (i) a meterstate and (ii) a true color of the packet.
3 . The system of claim 1 , further comprising:
a memory configured to store a table that associates connection identifiers with meterstates, wherein the network processor is further configured to retrieve, from a header of the packet, a connection identifier associated with the packet, and correlate the connection identifier with a meterstate.
4 . The system of claim 1 , wherein the network processor is further configured to mark the policed packet with a true color of the packet, to provide a marked packet.
5 . The system of claim 4 , wherein the network processor is further configured to discard or forward the marked packet, based on the policed packet.
6 . The system of claim 5 , wherein the network processor is further configured to increment a value of at least one of (i) a pass packet counter upon forwarding of the marked packet and (ii) a congestion discard counter upon discarding of the marked packet.
7 . The system of claim 2 , wherein the meterstate includes at least one of a translate field, a shaper enable field, at least one translation field, a color aware field, a skip policing field, and at least one pre-color field.
8 . The system of claim 7 , wherein the at least one translation field includes at least one of a green translation field, a yellow translation field, and a red translation field.
9 . The system of claim 7 , wherein the at least one pre-color field includes at least one of a green pre-color field, a yellow pre-color field, and a red pre-color field.
10 . The system of claim 7 , wherein the network processor is further configured to pre-color by selecting a value of the at least one pre-color field, based on a true color of the packet, and marking the packet with the value selected in the selecting.
11 . The system of claim 1 , wherein the network processor is further configured to pre-color by marking the packet with a value corresponding to a color of green.
12 . A method for emulating traffic shaping, comprising:
pre-coloring a packet to provide a pre-colored packet; and
policing the pre-colored packet to provide a policed packet.
13 . The method of claim 12 , wherein the pre-coloring of the packet is performed based on (i) a meterstate and (ii) a true color of the packet.
14 . The method of claim 12 , further comprising:
retrieving from a header of the packet a connection identifier associated with the packet; and
correlating the connection identifier with a meterstate.
15 . The method of claim 12 , further comprising marking the policed packet with a true color of the packet, to provide a marked packet.
16 . The method of claim 15 , further comprising discarding or forwarding the marked packet, based on the policed packet.
17 . The method of claim 16 , further comprising incrementing a value of at least one of (i) a pass packet counter upon forwarding of the marked packet and (ii) a congestion discard counter upon discarding of the marked packet.
18 . The method of claim 13 , wherein the meterstate includes at least one of a translate field, a shaper enable field, at least one translation field, a color aware field, a skip policing field, and at least one pre-color field.
19 . The method of claim 18 , wherein the at least one translation field includes at least one of a green translation field, a yellow translation field, and a red translation field.
20 . The method of claim 18 , wherein the at least one pre-color field includes at least one of a green pre-color field, a yellow pre-color field, and a red pre-color field.
21 . The method of claim 18 , wherein the pre-coloring further includes:
selecting a value of the at least one pre-color field, based on a true color of the packet; and
marking the packet with the value selected in the selecting.
22 . The method of claim 12 , wherein the pre-coloring further includes marking the packet with a value corresponding to a color of green.
23 . A non-transitory computer-readable medium having stored thereon sequences of instructions, the sequences of instructions including instructions, which, when executed by a network processor, cause the network processor to perform:
pre-coloring a packet to provide a pre-colored packet; and
policing the pre-colored packet to provide a policed packet.
24 . The computer-readable medium of claim 23 , the pre-coloring of the packet being based on (i) a meterstate and (ii) a true color of the packet.