Dell Force10 TeraScale C Series, Справочное руководство

Страница: 231 / 1640

Access Control Lists (ACL) | 231
The C-Series and S-Series cannot count both packets and bytes, so when you enter the
count byte
options, only bytes are incremented.
The
monitor
option is relevant in the context of flow-based monitoring only. See the Chapter 44, Port
Monitoring .
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 bit
mask 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 will use 8 entries in the CAM:
But an ACL rule with TCP port lt 1023 takes only one entry in the CAM:
Related
Commands
ip access-list extended
c e s
Name (or select) an extended IP access list (IP ACL) based on IP addresses or protocols.
Syntax ip access-list extended access-list-name
To delete an access list, use the no ip access-list extended access-list-name command.
Parameters
Defaults
All access lists contain an implicit “deny any”; that is, if no match occurs, the packet is dropped.
Command Modes
CONFIGURATION
Note:
When ACL logging and byte counters are configured simultaneously, byte counters
may display an incorrect value. Configure packet counters with logging instead.
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
Rule# Data Mask From To #Covered
1 0000000000000000 1111110000000000 0 1023 1024
Total Ports: 1024
deny Assign a deny filter for IP traffic.
deny tcp Assign a deny filter for TCP traffic.
access-list-name Enter a string up to 140 characters long as the access list name.