Cisco 2950G 24 - Catalyst Switch Software Configuration Manual page 251

Chapter 10 Configuring LRE
Table 10-1 LRE Profiles
LRE Link
Downstream Rate
Profile Name (Mbps)
LRE-15 16.667
LRE-10 (default) 12.500
LRE-5 6.250
LRE-998-15-4 16.667
LRE-997-10-4 12.500
LRE-15LL 16.667
LRE-10LL 12.500
LRE-5LL 6.250
LRE-10-5 12.500
LRE-10-3 12.500
LRE-10-1 12.500
LRE-8 9.375
LRE-7 8.333
LRE-15-5 16.667
LRE-15-3 16.667
LRE-15-1 16.667
LRE-4 4.167
LRE-3 3.125
LRE-2 2.083
LRE-4-1 4.167
LRE-4-1LL 4.167
Your data rates will always be less than the gross data rate listed in table. A small percentage of the link
rate is used by 2950 LRE switch for supervisory functions with the CPE device connected remotely.
In general, profiles are named for the data rate that you expect to achieve and not the gross data rate as
given in the table. All system-defined profiles have the prefix LRE, followed by the downstream user
data rate and then the upstream user data rate. If the profile is symmetric, only one data rate is given.
The two profiles defined to comply with public frequency usage plans 998 and 997 (LRE-998-15-4 and
LRE-997-10-4) are exceptions to this. These two uniquely named profiles work in any private
deployment.
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78-14982-01
LRE Link
Upstream Rate
(Mbps)
18.750
12.500
6.250
4.688
4.688
18.750
12.500
6.250
6.250
3.125
1.563
9.375
8.333
6.250
3.125
1.563
4.167
3.125
2.083
1.563
1.563
If you are not using sequences and you have not assigned a profile to an LRE port, the port has a
default value of LRE-10. Port profiles have priority over global profiles. If you assign a global
profile to the switch, the switch uses the global profile except on any LRE ports on which a specific
profile was assigned.
When you assign a different profile to a switch LRE port, the port immediately resets and uses the
newly assigned profile.
Theoretical Theoretical
Min SNR Min SNR
Downstream Upstream
31 25
25 19
16 13
31 25
31 25
31 25
25 19
16 13
25 13
25 19
25 13
25 25
19 19
31 13
31 19
31 13
13 13
13 13
13 13
19 13
19 13
Catalyst 2950 Desktop Switch Software Configuration Guide
LRE Links and LRE Profiles
10-3