MSM7xx Controllers Configuration Guide v6.4.0

Bandwidth rates for each level are defined by taking a percentage of the maximum transmit and
receive rates defined for the Internet port. Each bandwidth level has four rate settings:
• Transmit rate - guaranteed minimum: Minimum amount of bandwidth that will be assigned
to a level as soon as outgoing traffic is present on the level.
• Transmit rate - maximum: Maximum amount of outgoing bandwidth that can be consumed
by the level. Traffic in excess is buffered for short bursts, and dropped for sustained overages.
• Receive rate - guaranteed minimum: Minimum amount of bandwidth that will be assigned to
a level as soon as incoming traffic is present on the level.
• Receive rate - maximum: Maximum amount of incoming bandwidth that can be consumed by
the level. Traffic in excess is buffered for short bursts, and dropped for sustained overages.
Example
For example, assume that transmit bandwidth is configured as follows:
Transmit rates
MaxMin
2020Very High
10040High
10020Normal
2020Low
Next, assume the following bandwidth requirement occurs on transmitted user data:
• High requires 70%, which is 30% more than its minimum.
• Normal requires 50%, which is 30% more than its minimum.
• There is no traffic on Very High or Low.
Since both High and Normal require bandwidth in excess of their guaranteed minimum, each is
allocated their guaranteed minimum. This leaves 40% of the bandwidth free to be assigned on a
priority basis. High has more priority than Normal, so it takes as much bandwidth as needed. In
this case it is 30%, which brings High up to 70%. This leaves 10% for Normal, which is not enough.
Traffic is buffered for a short period, and then dropped.
If at the same time Very High traffic is sent, this level immediately steals 20% from the lower levels.
In this case, 10% is taken from Normal, returning it to its minimum guaranteed level, and 10% is
taken from High.
Discovery protocols
The controller supports two protocols (LLDP and CDP) that provide a mechanism for devices on a
network to exchange information with their neighbors.
To configure these protocols, select Controller >> Network > Discovery protocols.
On the MSM720
Discovery protocols 53