Configuration
212
zNID 24xx Series Configuration Guide
Packets which require the highest throughput or are sensitive to latency (the
amount of time between received packets) should be in higher priority queues.
Normally video and voice are more sensitive to throughput and latency issues.
Precedence
IP packets have a ToS byte in their headers that contains information about
relative priority. The IP Precedence field contains a 3-bit priority designation.
Most normal traffic has an IP Precedence value of zero. Higher values in this
field indicate that traffic is more important and that it requires special treatment.
IP Precedence values greater than 5 are reserved for network functions.
The format of the ToS byte:
Note:
Data is prioritized using only the Precedence bits, not the
entire Diffserv field.
5
High
WRR 16/8/4 (weight = 16)
6
Critical
Strict priority
7
Critical
Strict priority
Table 59: Precedence values
Precedence Values
Priority Queue
Priority Method
0 (Routine)
Low
WRR 16/8/4 (weight = 4)
32 (Priority)
Low
WRR 16/8/4 (weight = 4)
64 (Immediate)
Med
WRR 16/8/4 (weight = 8)
96 (Flash)
Med
WRR 16/8/4 (weight = 8)
128 (Flash Override)
Med
WRR 16/8/4 (weight = 16)
160 (Critical)
High
WRR 16/8/4 (weight = 16)
192 (Internetwork Control)
Critical
Strict priority
224 (Network Control)
Critical
Strict priority
Table 58: CoS value to priority mapping
CoS Value
Priority Queue
Priority Method
Summary of Contents for zNID-GE-2402
Page 12: ...About This Guide 12 zNID 24xx Series Configuration Guide ...
Page 18: ...zNID 24xx Series 18 zNID 24xx Series Configuration Guide ...
Page 84: ...Management 84 zNID 24xx Series Configuration Guide Figure 57 View audit log ...
Page 199: ...VLANS zNID 24xx Series Configuration Guide 199 Figure 157 Configuration of VLAN settings ...
Page 208: ...Configuration 208 zNID 24xx Series Configuration Guide ...
Page 220: ...Troubleshooting tests 220 zNID 24xx Series Configuration Guide ...
Page 223: ...Voice zNID 24xx Series Configuration Guide 223 Voice Figure 175 ...
Page 226: ...Index 226 zNID 24xx Series Configuration Guide ...