HP 5500 Ei 5500 Si Switch Series Configuration Guide

 78 
Appendix B Packet precedences 
IP precedence and DSCP values 
Figure 24 ToS and DS fields 
 
 
As shown in Figure 24, the ToS field in the IPv4 header contains eight bits, where the first three bits (0 to 
2) represent IP precedence from 0 to 7; the Traffic  Classes field in the IPv6 header contains eight bits, 
where the first three bits (0 to 2) represent IP precedence from 0 to 7. According to RFC 2474, the ToS 
field in the IPv4 header or the Traffic Classes field in  the IPv6 header is...

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DSCP value (decimal) DSCP value (binary)  Description 
20 010100 af22 
22 010110 af23 
26 011010 af31 
28 011100 af32 
30 011110 af33 
34 100010 af41 
36 100100 af42 
38 100110 af43 
8 001000 cs1 
16 010000 cs2 
24 011000 cs3 
32 100000 cs4 
40 101000 cs5 
48 110000 cs6 
56 111000 cs7 
0 000000 be  (default) 
 
802.1p priority 
802.1p priority lies in the Layer 2 header and applies to occasions where Layer 3 header analysis is not 
needed and QoS must be assured at Layer 2. 
Figure 25  An Ethernet...

 80 
Figure 26 802.1Q tag header 
 
 
Table 10 Description on 802.1p priority 
802.1
p priority (decimal)  802.1p priority (binary)  Description 
0 000 best-effort
 
1 001 background 
2 010 spare 
3 011 excellent-effort 
4 100 controlled-load 
5 101 video 
6 110 voice 
7 111 network-management 
 
  

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Index 
A C D I L M N O P Q R T U  
A 
ACL configuration task list,4 
A

pplying the QoS policy, 22 
C 
C

hanging the port priority of an interface,30  
C

lass-based accounting configuration example, 70 
C

olor-based priority marking, 60 
C

onfiguration example of using ACL for device 
management, 12 
C

onfiguration guidelines, 29 
C

onfiguration procedure,69  
C

onfiguration procedure,65  
C

onfiguration procedure,58  
C

onfiguration procedure,61  
Co

nfiguration restrictions and...

 82 
QoS techniques,17 
R 
R
edirect-to-next hop configuration example, 66 
T 
T

raffic filtering configuration example, 59 
T

raffic policing configuration example, 41  U 
U

ncolored priority mapping tables,
77 
U

sing the burst function to configure the data buffer 
setup, 74 
  

i 
Contents 
Configuring AAA ··················\
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AAA overview ··················\
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RADIUS ··················\
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Access device as the initiator ··················\
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802.1X authentication procedures ··················\
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A comparison of EAP rela y and EAP termination ··················\
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Network requirements ··················\
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Configuration procedure ··················\
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Verifying the configuration ··················\
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iv 
Specifying a portal server for Layer 3 portal authentication (available only on the HP 5500 EI series) ·· 143 
Configuring the local portal server ··················\
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Customizing authentication pages ··················\
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Configuring the loca l portal server...

v 
Configuration task list ··················\
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Enabling port security ··················\
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Setting port securitys limit on the  number of MAC addresses on a port··················\
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