Have you been studying for an AWS certification and have yet to actually
test? Now might be the time. AWS is currently offering free retakes of
their cer...
2 months ago
My Blog List
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The debates around IP multicast stopped about five to ten years ago AFAICT. No one wants to deal with it anymore. In theory, IP multicast was a good idea b...9 months ago
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https://cloud.google.com/load-balancing/docs/tcp/internal-proxy Traffic flow: client -> Load-balancer Forwarding rule TCP IP:port -> Target proxy -> backen...1 year ago
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At its core, DNS is what makes the internet work. Without it, everyone would need to remember the IP address…1 year ago
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Defining service availability using the famous X nines (and all the hacks like “planned downtime doesn’t count”) is pretty useless in a highly distribute...4 years ago
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Please join us in congratulating the following iPexpert students who have passed their CCIE lab! This Week’s CCIE Success Stories Lucas Handybiantoro, CCIE...8 years ago
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It’s official, the CCIE DC has been announced. Here’s the meat of the announcement: “Cisco announced today that a new expert-level certification for data c...12 years ago
About Me
- Packets Analyzed
- A dynamic, innovative, and skilled individual that is passionate about technology providing technical leadership and architectural oversight. I have in depth knowledge in a variety of technologies which provides a holistic overview of the environment and allows for superior solutions. I take business challenges and create IT solutions that are highly available, scalable, and secure. I have the ability to translate business objectives into IT initiatives. I have a continued thirst for knowledge and share that knowledge with colleagues, business partners, and vendors. I make contributions to the IT community participating in seminars, online forums, and actively blogging.
CCIE, CCNP, CCDP, CCIP, CCNA Voice, CCNA Security, CCNA R&S, CCDA, Network, GCFW, GSEC, CEH, VCP4, VCP3, CNE6, MCITP - WK8 Server Admin, MCTS - WK8 MS Certified Technology Specialist, MCTS - WK8 Network Infrastructure Config, MCTS - WK8 AD Config, MCTS - WK8 Application Infrastructure Config, MCSA-MS Certified Solutions Associate, MCSE 2K, MCSE 2K8, MCSA 2K, MCSE 2K3, A+, ITILv3, CSA, CQS-FDS, FCNSA, FCNSP, BCNP, CDCSN-DS, BCLE, ACE, CNSS, CNSE, BCLP, CS-CRSFS, HP AIS
Popular Posts
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When building networks leveraging a variety of products you need to consider interoperability and configuration consistency. When leveraging... -
The topology depicted in the diagrams is used to help demonstrate data flow during failure and to provide discussion around best practices a... -
JunOS separates the control plane and the forwarding (data) plane. The control plane contains the processes that control routing and switchi... -
The flow starts with the initial "Packet Processing" ----> "Security Pre-Policy" ----> "Application" --... -
VLR - (Visitor Location Register) A database of the subscribers who have roamed into the domain of another MNO (Mobile Network Operator/MS...
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Confirming that local authentication on the switch and ACS is working after you finished your configuration perform the following: Run t... -
If you struggle with what is what in regards to Inside/Outside Local/Global then the following may help. View it from the following perspe... -
Well it is time to buckle down and make it happen in 2014. The goal is to become a dual CCIE by the end of 2014. I have previously passed th...
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Nexus 7000/5000 SPAN Sessions SPAN Session Limit - 18 Nexus 1000V SPAN Session Limit (SPAN and ERSPAN) - 64 Nexus 5000 SPAN Sessions Can S...
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Master Selection - High Availability with Fortinet Master (also known as the Primary) is chosen based on the following monitored port ...
1 comments:
UDLD (UniDirectional Link Detection) - is a layer 2 protocol that is used to detect the status of a layer 1 physical link. It identifies when data is set to a neighbor but the neighbor is not able to transmit back to the sending
device.
Example: |SW1| -----Link---- |SW2| SW1 transmits the data to SW2 through its Tx wire and SW2 cannot receive the data on its Rx wire (physical issue). Note: SW2 Tx wire is fine. UDLD must be enabled on both sides of the link to detect the issue identified above. UDLD sends packets to the neighbor and expects an echo back, if no echo is received UDLD disables the port.
Global Config
"udld enable" - this is only used on fiber links
Interface Config
"udld enable" - this can be used for copper and for fiber links (with fiber links this setting overrides the global config setting)
"show udld interface (interface)"
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