Quick Reference Guide

ACL Commands 265
subnets. In general, any rule that specifies matching on an upper layer
protocol field should also include matching constraints for lower layer
protocol fields. For example, a rule to match packets directed to the well-
known UDP port number 22 (SSH) should also include constraints on the IP
protocol field (UDP). Below is a list of commonly used ethertypes:
In order to provide the greatest amount of flexibility in configuring ACLs, the
permit/deny syntax allows combinations of matching criteria that may not
make sense when applied in practice.
Port ranges are not supported for ACLs configured in egress (out) access-
groups. This means that only the eq operator is supported in an egress (out)
ACL.
The protocol type must be tcp or udp to specify a port range.
The fragment keyword is not supported for ACLs configured in egress (out)
IPv4 access-groups.
Ethertype Protocol
0x0800 Internet Protocol version 4 (IPv4)
0x0806 Address Resolution Protocol (ARP)
0x0842 Wake-on LAN Packet
0x8035 Reverse Address Resolution Protocol (RARP)
0x8100 VLAN tagged frame (IEEE 802.1Q)
0x86DD Internet Protocol version 6 (IPv6)
0x8808 MAC Control
0x8809 Slow Protocols (IEEE 802.3)
0x8870 Jumbo frames
0x888E EAP over LAN (EAPOL – 802.1x)
0x88CC Link Layer Discovery Protocol
0x8906 Fibre Channel over Ethernet
0x8914 FCoE Initialization Protocol
0x9100 Q in Q
2CSNXXX_SWUM200.book Page 265 Tuesday, December 10, 2013 1:22 PM