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Chapter 19: Configuring an Integrated Scheduler to Provide QoS for ATM
Table 17: Operational Shaping Modes for ERX7xx Models, ERX14xx Models, and the
ERX310 Router
qos-shaping-mode
Rule
for the Specific Port
Rule
Cell
1
Frame
Rule
No shaping mode
2
No shaping mode
Rule
No shaping mode
3
No shaping mode
E120 Router and E320 Router
The E120 router and the E320 router use an operational shaping mode that is based
on the following two commands:
The QoS shaping mode you set with the qos-shaping-mode command on port
0 and on the specific port
The port queuing mode you set with the qos-mode-port command on port 0
and on the specific port
The E120 and E320 routers use the following rules to determine the operational
shaping mode used for a port:
If the specific port has a QoS shaping mode configured, the operational shaping
1.
mode for that port is the same as the QoS shaping mode.
If the specific port has no QoS shaping mode and a port queuing mode of low-cdv
2.
configured, the operational shaping mode is cell.
If the specific port has no QoS shaping mode and no queuing mode configured,
3.
the operational shaping mode for that port is the same as the port 0 QoS shaping
mode.
If both the specific port and port 0 have no QoS shaping mode configured, the
4.
operational shaping mode is based on the port 0 queuing mode. If the port 0
queuing mode (set by the qos-mode-port command) is low-cdv, the operational
shaping mode is cell; otherwise the operational shaping mode is frame.
Table 18 on page 166 lists the possible combinations of the two commands and the
resultant operational shaping mode.
qos-shaping-mode
qos-mode-port
for Port 0
for Port 0
Cell
low-cdv
Frame
low-latency or none
Cell
low-cdv
Frame
low-latency or none
No shaping mode
low-cdv
No shaping mode
low-latency or none
Per-Packet Queuing on the SAR Scheduler Overview
Operational
Shaping Mode for
the Specific Port
Cell
Frame
Cell
Frame
Cell
Frame
165
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Troubleshooting
