Dell Networking S4810, Reference Manual

Page: 238 / 1761

Version 8.3.7.0 Introduced on the S4810.
Version 8.3.1.0 Added the keyword
dscp
.
Version 8.2.1.0 Allows ACL control of fragmented packets for IP (Layer 3)
ACLs.
Version 8.1.1.0 Introduced on the E-Series ExaScale.
Version 7.6.1.0 Introduced on the S-Series.
Version 7.5.1.0 Introduced on the C-Series.
Version 7.4.1.0 Added support for non-contiguous mask and added the
monitor
option. Deprecated the keyword
established
.
Version 6.5.10 Expanded to include the optional QoS
order
priority for the
ACL entry.
Usage
Information
The
order
option is relevant in the context of the Policy QoS feature only. For
more information, refer to the “Quality of Service” chapter of the Dell Networking
OS Configuration Guide .
NOTE: When ACL logging and byte counters are configured simultaneously,
byte counters may display an incorrect value. Configure packet counters with
logging instead.
When you use the
log
option, the CP processor logs details about the packets that
match. Depending on how many packets match the log entry and at what rate, the
CP may become busy as it has to log these packets’ details.
The S-Series cannot count both packets and bytes; when you enter the count byte
options, only bytes are incremented.
The
monitor
option is relevant in the context of flow-based monitoring only. For
more information, refer to Port Monitoring .
Most ACL rules require one entry in the CAM. However, rules with TCP and UDP
port operators (for example, gt, lt, or 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.
Example
An ACL rule with a TCP port range of 4000–8000 uses eight 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
238
Access Control Lists (ACL)