Semi-Retired, Fully Experienced
40+ years experience in IT / Computer Networking, including:
- 24 years as Cisco SE
- 19 years Enterprise IT, as both customer and Cisco SE
- 22 years SP experience, as both customer and Cisco SE
CCIExpired #5286
https://www.linkedin.com/in/jimberg/
Two units with arcing/failing capacitors is quite odd. Are you located in an area prone to thunderstorms and lighting strikes? Any copper/Cat5 cabling exiting the building? Have you checked the grounding of your power circuits? Are your units on a UP...
"I was curious to know where the IP lookup takes place in a Cisco router?"TL;DR: Unless you are talking about a CPU-based router, it takes place in the NPU.Too long version...I believe that there are really two questions packed in here:Where does the...
Take a look at the MAC addresses assigned to interfaces in your own Cisco switches and you are likely to find reuse across multiple interfaces. Some time ago, with IEEE encouragement, equipment vendors started shipping products that reuse the same MA...
As @Joseph W. Doherty says, the (VLAN, MAC dest addr) tuple provides uniqueness, as it is perfectly legal to reuse the same MAC address over and over in different broadcast domains or VLANs. Both VLAN ID and MAC DA must be used to lookup the egress i...
Hi @KJK99 . I'm saying "metadata" because it is data about the packet and I do not want to imply that anything is written into the packet itself, as it is written into a packet descriptor structure that is associated with the packet. Examples of this...