FTOS Command Reference for the S-Series - Force10 Networks

permit udp
Command Modes ACCESS-LIST (config-ext-nacl)
Command
History
Usage
Information
Related
Commands
Version 7.6.1.0 Added support for S-Series
Version 7.5.1.0 Added support for C-Series
Version 7.4.1.0 Added support for non-contiguous mask and added the monitor option.
Version 6.5.10 Expanded to include the optional QoS order priority for the ACL entry.
The order option is relevant in the context of the Policy QoS feature only. See the the Quality
of Service chapter of the FTOS Configuration Guide for more information.
The monitor option is relevant in the context of the flow-based monitoring feature only. See
the Chapter 15, “Port Monitoring,” on page 387.
Note: When ACL logging and byte counters are configured simultaneously, byte
counters may display an incorrect value. Configure packet counters with logging
instead.
Most ACL rules require one entry in the CAM. However, rules with TCP and UDP port
operators (gt, lt, range) may require more than one entry. The range of ports is configured in
the CAM based on bitmask boundaries; the space required depends on exactly what ports are
included in the range.
For example, an ACL rule with TCP port range 4000 - 8000 uses 8 entries in the CAM:
Rule# Data Mask From To #Covered
1 0000111110100000 1111111111100000 4000 4031 32
2 0000111111000000 1111111111000000 4032 4095 64
3 0001000000000000 1111100000000000 4096 6143 2048
4 0001100000000000 1111110000000000 6144 7167 1024
5 0001110000000000 1111111000000000 7168 7679 512
6 0001111000000000 1111111100000000 7680 7935 256
7 0001111100000000 1111111111000000 7936 7999 64
8 0001111101000000 1111111111111111 8000 8000 1
Total Ports: 4001
But an ACL rule with TCP port lt 1023 takes only one entry in the CAM:
Rule# Data Mask From To #Covered
1 0000000000000000 1111110000000000 0 1023 1024
Total Ports: 1024
ip access-list extended Configure an extended ACL.
permit Assign a permit filter for IP packets.
permit tcp Assign a permit filter for TCP packets.
338 Access Control Lists