3Com Switch 8807, Command Reference Manual

Page: 229 / 1099

ACL Commands 227
established : (Optional) It is effective only to the first SYN packet established by
TCP and active when protocol is set as tcp .
precedence precedence : (Optional) IP priority level, in a number (ranging from 0
to 7) or a name.
tos tos : (Optional) Indicating packets are classified by TOS value, in a number
(ranging 0 to 15) or a name.
dscp dscp : (Optional) Indicating packets are classified by DSCP value, in a number
(ranging from 0 to 63) or a name.
fragment : It is only effective to fragmented messages and is ignored by
non-fragmented messages.
bt-flag : It indicates that the rule is effective to BT data messages only. If you use
this key word, the protocol in the rule must be tcp . The parameter is applicable to
defining the advanced ACLs.
vpn-instance instance-name: VPN instance name. The specified MPLS VPN
packets will be identified if this parameter is selected.
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Parameters specific to Layer 2 ACLs:
cos : Specifies 802.1p priority in the most external 802.1QTag carried by the
packet.
cos-value : In number format (ranging 0 to 7) or just entering the priority name.
See Table 1-5 for their correspondence.
information-request 15 0
net-redirect 5 0
net-tos-redirect 5 2
net-unreachable 3 0
parameter-problem 12 0
port-unreachable 3 3
protocol-unreachable 3 2
reassembly-timeout 11 1
source-quench 4 0
source-route-failed 3 5
timestamp-reply 14 0
timestamp-request 13 0
ttl-exceeded 11 0
Table 32 COS priority definition
Number Priority name
0 best-effort
1 background
Table 31 Relationship of type and code
ICMP packet type (TYPE) ICMP packet type (TYPE) ICMP code (CODE)