TCP/UDP port based COS
The user can select the protocol that will be forwarded as the
specified mode. There are 3 user-defined UDP/TCP port groups
and many well-known TCP/UDP ports. The user-defined port
number may be a range or a specific number, depending on the
mask.
The operating theory for all 4 CoS types can be illustrated by the
following figure and table.
TCP/UDP CoS is a global setting for all ports and has no
connection with the physical port. Other CoS types have a
connection with the physical port.
(a)
Priority Mode:
WRR. Q1=4; Q2=2; Q3=8; Q4=1
(b)
TCP/UDP CoS:
P2 FTP =>Q3; P5 SMTP => Q2; other
protocols=Q1
(c)
TOS/DS setting:
P5 TOS 6’b010010=Q1; P2 TOS
6’b100010=Q3; other TOS=Q4
(d)
802.1p:
P5 802.1p = 6; P2 802.1p =1
(e)
Physical port:
P2=Q4; P2=Q3
According to the rule described above, the CoS will be executed in
the following sequence.
TCP/UDP > TOS/DS > 802.1p > Physical port.
