Dell FCX624-S Laptop User Manual


  Open as PDF
of 1494
 
612 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
Configuration notes and feature limitations
18
Configuration notes and feature limitations
Note the following when configuring traffic policies:
Traffic policies applies to IP ACLs only.
The maximum number of supported active TPDs is a system-wide parameter and depends on
the device you are configuring. The total number of active TPDs cannot exceed the system
maximum. Refer to “Maximum number of traffic policies supported on a device” on page 612.
You can reference the same traffic policy in more than one ACL entry within an ACL. For
example, two or more ACL statements in ACL 101 can reference a TPD named TPD1.
You can reference the same traffic policy in more than one ACL. For example, ACLs 101 and
102 could both reference a TPD named TPD1.
To modify or delete an active traffic policy, you must first unbind the ACL that references the
traffic policy.
When you define a TPD (when you enter the CLI command traffic-policy), explicit marking of
CoS parameters, such as traffic class and 802.1p priority, are not available on the device. In
the case of a TPD defining rate limiting, the device re-marks CoS parameters based on the
DSCP value in the packet header and the determined conformance level of the rate limited
traffic, as shown in Table 107.
When you define a TPD, reference the TPD in an ACL entry, and then apply the ACL to a VE in
the Layer 3 router code, the rate limit policy is accumulative for all of the ports in the port
region. If the VE or VLAN contains ports that are in different port regions, the rate limit policy is
applied per port region.
For example, TPD1 has a rate limit policy of 600M and is referenced in ACL 101. ACL 101 is
applied to VE 1, which contains ports e 1/11 to e 1/14. Because ports e 1/11 and 1/12 are
in a different port region than e 1/13 and 1/14, the rate limit policy will be 600M for ports e
1/11 and 1/12, and 600M for ports e 1/13 and 1/14.
Maximum number of traffic policies supported on a device
The maximum number of supported active traffic policies is a system-wide parameter and depends
on the device you are configuring, as follows:
TABLE 107 CoS parameters for packets that use rate limiting traffic policies
Packet conformance level Packet DSCP value Traffic class and 802.1p priority
0 (Green)
or
1 (Yellow)
0 – 7 0 (lowest priority queue)
8 – 15 1
16 – 23 2
24 – 31 3
32 – 39 4
40 – 47 5
48 – 55 6
56 – 63 7 (highest priority queue)
2 (Red) N/A 0 (lowest priority queue)