Category: Tech Blogs
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RAG basics
Data preparation for RAG Web scraping tool — Crawl4AI , youtube video www.example.com/sitemap.xml e.g. https://www.cisco.com/web/sitemap/www_cisco_com_en_us_index.xml www.example.com/robots.txt (view allow/disallow list). e.g https://www.cisco.com/robots.txt other docs incl. PDF, DOCX, PPTX, XLSX, HTML, WAV, MP3, VTT, images (PNG, TIFF, JPEG, …) Docling
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multicast study note
PIM-SSM: no RP RP, FHR(closest to the source), LHR(closest to the receiver), Shared tree to SPT(shorted path tree) fallback Bi-DR (phantom RP): no source tree (S,G), only shared tree; DF-closest to RP RPF check — prevent duplicate of multicast packets. When a router receives duplicate streams from different incoming intfs, it performs the RPF-check against…
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Why do we need RT when there’s already RD
Imagine a SP has 1000 CUs, each CU is a VRF so 1000 VRFs. And then there is a service VRF that provides common services to those 1000 CUs. So the service VRF has to import all 1000 CU’s routes to allow mutual communication (CUs needs to import service VRF and service VRF needs to…
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VXLAN Terminology
General: ======== Underlay: Overlay: VNI/VNID: L2VNI: L3VNI: IP forward: Infra-vlan: Arp-suppression: NVE: BUM Traffic: Advertise PIP/Virtual RMAC: Node Types: ================ Spine: VTEP(leaf): Border Leaf: Border Gateway: Border Spine: Psuedo Border Gateway (need to validate): NDFC switch roles: Switch Role Description Spine Spine switches provide Layer-3 underlay inter-connection between leaf switches as well as BGP EVPN control…
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BPI-R4 expand overlay (user volume size)
https://forum.banana-pi.org/t/bpi-r4-how-to-resize-overlay-of-emmc/18078/4
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traefik providers
file provider type is for local and remote apps, even VMs that are not related to containers. docker provider type is for local apps ONLY, as it will read through API everything on the right side of the mappings, e.g. port 80:10000, i.e. only the container side. So for example when the external apps are…
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truenas Apps fail to start after restoring a pool or hardware change
If you get a message like this when you unset and set your app pool, this is your lucky day: image658×649 18.7 KB Symptom: You get “Apps Service Stopped” message and all your apps have disappeared. You try to unset the pool and set the pool for the apps and same problem. If you mouse over…
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linux cmd to check power consumption
check mw per second sudo -i (initial=$(cat /sys/class/powercap/intel-rapl:0/energy_uj); sleep 1; final=$(cat /sys/class/powercap/intel-rapl:0/energy_uj); power_mw=$(( (final – initial) / 1000 )); echo “Power consumption: $power_mw mW”) Not sure if it’s accurate thou.