What is link up and down?
Table of Contents
What is link up and down?
In satellite telecommunication, a downlink is the link from a satellite down to one or more ground stations or receivers, and an uplink is the link from a ground station up to a satellite. Some companies sell uplink and downlink services to television stations, corporations, and to other telecommunication carriers.
What is the port for SNMP traps?
number 162
An SNMP trap port is the port at which the manager receives the traps. This port is typically set as port number 162. However, you can change this port if necessary, and it may also differ depending on the SNMP manager you’re using.
Where do SNMP traps go?
The SNMP manager getting the SNMP traps from the network devices or agents will store the OID in a translation file which is known as the Management Information Base or MIB.
What is SNMP trap sink?
The SNMP agent generates startup and shutdown traps to help monitor the appliance. These two traps are sent to the SNMP manager configured in the SNMP Trap Sink. Type the IP address and port number of your SNMP trap receiver.
What is downlink port?
The Ethernet downlink ports allow third party devices such as VoIP phones or printers (which support only wired connections) to connect to the wireless network. Additionally, an Access Control List (ACL) can be configured for added security on the Ethernet downlink.
How do you set up SNMP traps?
trap receiver:
- Navigate to Configuration > System.
- Click Show advanced options.
- Expand Monitoring.
- Go to the SNMP section.
- Under SNMP Trap Receivers, click + and update the following information in the window that is displayed: IP address—Enter the IP Address of the new SNMP.
- Click OK.
- Click Save.
How are SNMP traps sent?
An SNMP trap is a type of SNMP protocol data unit (PDU). Unlike other PDU types, with an SNMP trap, an agent can send an unrequested message to the manager to notify about an important event.
How do SNMP traps work?
What is the reason if the interface is up and the line protocol is down?
FastEthernet0 is up, line protocol is down: In this case, Physical layer is operational. The line protocol being down indicates a clocking or framing problem. Probable reasons for this are encapsulation and clock rate mismatches.
What is the difference between uplink and downlink frequency?
Uplink frequency is the frequency at which, the first earth station is communicating with satellite. The satellite transponder converts this signal into another frequency and sends it down to the second earth station. This frequency is called as Downlink frequency.
How do you set up traps?
How to configure a device to send SNMP traps?
- Ensure that SNMP is enabled and then enable traps in your network device.
- Set the trap destination host address as the IP address or the host name of the respective On-Premise Poller.
- Set the trap destination port to be 162.
- Specify Community.
- Save the configuration.
How do you check if a SNMP trap is received?
Download the snmputil.exe utility from the Internet. Open a command prompt and type snmputil trap. If no traps are received by snmputil, then catrapd will not display any traps. You can use a network sniffer to determine if traps are being received by your system.
What is a trap port?
The port through which Traps are listened for or received is called a trap port. So, for Web NMS to listen for traps, you should make an entry in the trapport. conf, specifying the port in which it should listen.
What causes a switch port to go down?
If the port goes into shutdown mode immediately after a reboot of the switch, the probable cause is the port security setting. If unicast flooding is enabled on that port, it can cause the port to shut down after a reboot.
Which is faster uplink and downlink?
In satellite communication, the uplink frequency is higher than the downlink frequency because the attenuation level increase with an increase in frequency. The power at the ground station (Base Station) is more than compared to the power available at the satellite.
