3Com Switch 8800 Family Command Reference Guide

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.
■ 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
Tab le 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)