How to troubleshoot the transceiver (or switch port on Cisco switch? Making a loopback test is a simple way. In this video, we made tw. A loopback interface is a logical, virtual interface in a Cisco router. A loopback interface is not a physical interface like Fast Ethernet interface or Gigabit Ethernet interface.
- Loopback Cisco Configuration
- Routing Loopback Cisco
- Interface Loopback Command
- Loopback Ip Address Cisco
- Loopback interfaces do not have internal VLAN IDs or MAC addresses. With Layer 2 Cisco switches like the 3500XL or 2950, a loopback interface is not needed since these switches are not capable of.
- Cisco Loopback Tests. Loopback Modes; BERT Tests. There are three main loopback modes as follows: local, network (both line and payload), and remote (line and payload). Specify the loopback format using the loopback local network remote command. Examples of specific loopback modes follow: Set the first T1 into local.
Collaboration
![Loopback Loopback](https://i.ytimg.com/vi/zzjM5PfB7Nk/maxresdefault.jpg)
To make sure the audience joining a Webex Event early, can verify their audio settings, confirm their audio working, music before the actual event started is handy option. This short post provides you with an introduction on how you can achieve this with your laptop and no additional hardware.
Follow the below tutorial to see it in action:
- Install an audio loopback tool (e.g. VB Audio Driver or Loopback)
- Locally installed music player with music you have the right to play to the audience.
- Route the music with help of the loopback tool to your softphone (e.g. Cisco Jabber)
- Please dial e.g. your mobile phone to verify the music is played correctly and in the quality expected.
- Dial into the event with your softphone (e.g. Cisco Jabber) as an attendee.
- As a meeting host, Un-Mute this specific attendee.
Loopback Cisco Configuration
Once the user is unmuted, the whole audience will hear the music playing. To stop the music on hold before the meeting starts, mute the user, drop him or stop the music playing.
- Webex User Guide: How Do I Play Music for Event Participants while Panelists are in a Practice Session?
- VB Audio Driver for Windows users
- Loopback for Apple Users
Routing Loopback Cisco
Loopback
Loopback is a commonly used term in telecommunications. It refers to the process of transmitting electronic signals or digital data streams and returning to their sending point without any intentional processing or modification. Therefore, by comparing transmitting signals with the receiving signals, the loopback test is used to debug physical connection problems. But what a loopback test means for fiber optic network and how to make use of it will be the issues that we will explore in this post.
Why Need Fiber Loopback Test?
To conduct a fiber loopback test, the communication devices will be involved, like the transceivers and the switch. As you know, the transceiver is the basic component of fiber optic communication network equipment. We can take the transceiver as a case. Conventionally, a transceiver has a transmitting port and a receiving port, in that way, the loopback test can be applied to test the ports to diagnose whether the transceiver is working well and the configuration of the switch is right. For its unique working mode, the test is a convenient way to maintain transceivers. Archive expert 5 10 – full featured archive manager. In the next part, we will deliver how to do the fiber loopback test on the transceiver.
Interface Loopback Command
How to Conduct Loopback Test?
In this part, we will introduce two types of tests to troubleshoot transceiver and switch port: single-port test and dual-port test.
To perform tests, things you need to prepare are listed below:
- Transceivers (2pcs), such as 10G SFP+ SR transceiver.
- Simplex fiber cable (1 pc).
- Switch (1 pc), like Cisco switch.
- Duplex fiber cable (1 pc).
- Two loopback cables (optional), like LC or SC loopback cable. To know more about loopback cable, you can move to the article: What Is Loopback Cable And How to Use It?
Figure 1: Loopback Cable
Single-port Loopback Test
Deja vu 4 8 8. Figure 2: Single-port Loopback Test
1. Connect your transceiver with one simplex fiber cable or loopback cable, such as LC fiber cable or LC loopback cable. At this step, you can examine whether the port and transceiver parameters are normal.
Loopback Ip Address Cisco
2. Check the software version of the switch.
3. Review the interfaces status to confirm the working status of all ports on the switch.
Figure 3: Display the Working Status of All Ports
4. Check the working status of the port you are connecting, such as the port 50 in the following figure.
Figure 4: Working Status of Interface 50
5. Go over the DDM information to review whether the transceiver works in normal status.
Figure 5: DDM Information of Port 50
Figure 6: Dual-port Loopback Test
1. Connect two transceivers with one duplex fiber cable or two loopback cables. At this step, you can examine whether the port and transceiver data rate are matching as well as the link is normal or not.
2. Check the interfaces status to confirm the working status of all ports on the switch.
Figure 7: Ports Working Status Display
3. Check the working status of the two ports you are connecting, such as the ports 50 and 52 in the following figure.
Figure 8: Working Status of Interfaces 50 and 52
4. Go over the DDM information to review whether the transceiver works in normal status.
Figure 9: DDM Information of Ports 50 and 52
Summary
To troubleshoot the circuit connectivity as well as the transceiver and the switch port, loopback test is a cost-effective way. In this post, we have an overview of loopback and make a demonstration of how to conduct the loopback test on a switch to debug the transceiver and the switch port.