Not exactly sure of the context you are asking from but there are several ways - query the device using SNMP to report on state and statistics of the interface, setup the device to generate SNMP traps in the event of state change, monitor and act on syslog messages generated by the device. Those are just the most common of several ways.
I take it you want to verify confirmed end-end reachability of both sides of an Ethernet connection from the router itself. The usual approach is to use an external tools that looks at each end's characteristics and makes a conclusion based on that.
If you want something closer to the absolute truth then IP SLA and tunnel monitoring are good ones. Depending on the platform you may be able to use something like mediatrace as well. You can also leverage embedded event manager (EEM) to give you some insight.
DMVPN (Dynamic Multipoint VPN) Introduced by Cisco in late 2000 is a routing technology you can use to build a VPN network with multiple sites (spokes) without having to statically configure all devices. It’s a “hub and spoke” network, where the spok...
On 24th August 2021, Cisco announced the latest IOS XE release - Cisco IOS XE Bengaluru 17.6.1a
IOS XE 17.6.1a unlocks various routing features and enhancements comprehensively covering different technology segments such as voice, security,...
DMVPN (Dynamic Multipoint VPN) Introduced by Cisco in late 2000 is a routing technology you can use to build a VPN network with multiple sites (spokes) without having to statically configure all devices. It’s a “hub and spoke” network, where th...
SummaryRequirementsConfiguration StepsVerificationFAQTroubleshootingReferences & Tools
In the past when IOS 12.x was hot stuff we used MD5 to authenticate OSPF neighbors. This worked great on ethernet networks because OSPF is a m...
Chapter 1 – Pre-requisite
You have Root or Super Users access privileges of Cisco Prime Infrastructure.
You have access credentials of Cisco DNA Center.
You use Cisco Prime Infrastructure version 3.5 and above which is compatible with Cisco DNA Center v...