Automatically Recover from Error Conditions
By default, ports put into the errdisable state must be re-enabled manually. This is done by issuing the shutdown command in interface configuration mode, followed by the no shutdown command. Before you re-enable a port from the errdisable condition, you always should determine the cause of the problem so that the errdisable condition doesn’t occur again. You can decide to have a switch automatically reenable an errdisabled port if it is more important to keep..
There are downsides to multicasting that must be recognized. Because multicast traffic is generally UDP it lacks windowing functions, packet ordering, and capability for retransmission. It also lacks the ability to allow some users to receive multicasts while preventing others on the segment (although there are ways to block multicasts at the router). These challenges can be met creatively at the protocol level. For multimedia traffic, ordering is handled by the..
Aggregatable Global Unicast Addresses
IPv6 defines several different types of unicast addresses. The format used for publicly registered addresses is called aggregatable global unicast. The term aggregatable refers to fact that these addresses can be easily aggregated to reduce the problem of large Internet routing tables. The term global refers to the fact that the address is a registered public IP address, routable through the global Internet. In short, when a company obtains a registered IPv6 prefix from a Reg..
Single-Rate, Three-Color Policing of All Traffic
Example 16-8 shows how to police all traffic, with criteria as follows: ■ Create a single-rate, three-color policing configuration. ■ All traffic policed at 96 kbps at ingress. ■ Bc of 1 second’s worth of traffic is allowed. ■ Be of 0.5 second’s worth of traffic is allowed. ■ The conform, exceed, and violate actions should be to forward, mark down to DSCP 0, and discard, respectively. Example 16-8 Single-Rate, Three-Color CB Policing at 96 kbps &nb..
The term location-based services (LBS) is sometimes used interchangeably with WLAN location services, but LBS more correctly denote services that provide the user with information about the physical location of the client device. Conversely, WLAN location services provide telemetry information on WLAN devices. This information is used by many applications to provide visibility of mobile devices, asset location and tracking information, inventory and supply chain management su..
