Huawei Quidway S3500 Series - Page 345

Operation Manual - QoS/ACL
Quidway S3500 Series Ethernet Switches Chapter 1 ACL Configuration
Huawei Technologies Proprietary
1-19
Table 1-21 Length of template elements
Name Description
Length in
template
cos 802.1p priority in the Ethernet packet header 1 byte
dip Destination IP field in IP packet header 4 bytes
dmac Destination MAC field in Ethernet packet header 6 bytes
dport Destination port field 2 bytes
dscp DSCP field in IP packet header
ip-precedence IP precedence field in IP packet header
tos ToS field in IP packet header
1 byte
ethernet-protocol Protocol field in Ethernet packet header 2 bytes
fragments Fragments field in IP head 0 bytes
icmp-code ICMP code field 1 byte
icmp-type ICMP type field 1 byte
ip-protocol Protocol field in IP packet header 1 byte
sip Source IP field in IP packet header 4 bytes
smac MAC field in Ethernet packet header 6 bytes
sport Source port field 2 bytes
tcp-flag Flag field in TCP packet header 1 byte
 Note:
The numbers listed in the table are not the actual length of these elements in IP packets,
but their length in flow template. DSCP field is one byte in flow template, but six bytes in
IP packets. You can judge the total length of template elements using these numbers.
The dscp, ip-precedence and tos fields jointly occupy one byte. One byte is occupied
no matter you define one, two or three of these fields.
The fragment field is 0 in length in flow template, so it can be ignored in calculating the
total length of template elements.