What is LMI type in Frame Relay?
Local Management Interface (LMI), a technology developed by Cisco, is a signaling standard that is used between the routers and frame relay switches for various purposes such as exchanging information keepalives timers, global addressing, multicasting and the current status of virtual circuits.
Which IOS Debug command is used to display information about sending and receiving Frame Relay LMI inquiries?
debug frame-relay lmi EXEC mode command
The debug frame-relay lmi EXEC mode command is used to display information on the LMI packets exchanged by the router and the Frame Relay switch. The information from the debugging output can be used to determine whether the router and the Frame Relay switch are sending and receiving LMI packets properly.
Is Frame Relay still relevant?
The reason you are learning Frame Relay & PPP is to comprehend basic networking principles. Today, these technologies are no longer widely used (although Cisco sells rather a lot of them to people running obsolete but useful/valuable networks).
What is the default LMI type?
Today’s most popular option is to use the default LMI setting. This setting uses the LMI autosense feature, in which the router simply figures out which LMI type the switch is using. So you can simply let the router autosense the LMI and never bother coding the LMI type.
How do you set a Frame Relay point to point?
- Step 1: Configure Frame Relay encapsulation on the S0/0/0 interface of R1.
- Step 2: Configure Frame Relay encapsulation on the S0/0/0 interfaces of R2 and R3.
- Step 3: Test connectivity.
- Step 1: Configure subinterfaces on R1, R2, and R3.
- Step 1: Verify the Frame Relay configuration.
In what situation would it be best to use Frame Relay subinterfaces?
15 Cards in this Set
| The maximum average data rate that a service provider guarantees to a customer is known as the __________. | Committed Information Rate |
|---|---|
| In what situation would it be best to use Frame Relay subinterfaces? | any time EIGRP or OSPF is used across the Frame Relay cloud |
What is the benefit of Frame Relay?
Benefits or advantages of Frame Relay It offers high throughput compare to X. 25. ➨The bandwidth can be allocated dynamically as per need. ➨The network overhead is less due to incorporation of congestion control mechanism.
When was Frame Relay introduced?
1990s
At the beginning of the 1990s, Frame Relay service was introduced. While using the same DS0 and fractional or full T1/E1 and T3/E3 connections, by connecting to a “cloud” from a service provider, you no longer needed to purchase and manage individual links between each of the locations that you wanted to connect.
What DLCI does the Cisco LMI operate on?
DLCI 1023 is reserved for Cisco LMI, however, numbers 16 to 1007 are usable.
How often does frame relay receive LMI status messages?
As a result of the configuration change, the Frame Relay switch interface continues to expect LMI status messages from router R1 at 10-second intervals but it hears an LMI status message from R1 only after every 30 seconds.
Can a frame relay interface be configured per DLCI?
Unlike Frame Relay encapsulation, LMI type cannot be configured on a per-DLCI basis. It has to be configured at the interface level. When manually configuring the LMI type on the Frame Relay interface, the selected LMI type on the router must match the LMI type supported by the connected Frame Relay switch.
What does the LMI status Exchange message Do?
The LMI status exchange messages are used for the purpose of communication between the router and the switch to determine the status of the PVC connection. For example, a large mismatch in the keepalive interval on the router and the switch can cause the switch to declare the router dead.
How to disabling LMI autosense on Frame Relay interface?
Disabling LMI autosense permits the user to specifically configure either the ANSI Annex D, the ITU Q933-A, or the Cisco LMI type to be used on an interface. Unlike Frame Relay encapsulation, LMI type cannot be configured on a per-DLCI basis.
