On Wednesday, January 08, 2014 09:45:50 PM excelsio@gmx.com wrote:
That´s actually a topic, I was thinking ago some time ago. Why not take a current TOR switch with 1. BGP support and 2. high buffer. Like mentioned above we have Trident 2 bases switches. HP (no recommendation) has its HP 5930 series but tells "Routing table size 16000 entries (IPv4), 8000 entries (IPv6)", but this one has 4GB RAM, so plenty of space for full tables. I haven´t tried it out myself, perhaps someone tried on any other device: What will happen, if I give the switch a full table? Is there a software limit by the vendor, which will simply cut everything above? Or would it simply work?
The 4GB RAM is control plane memory. The problem is FIB memory, since switches generally forward Layer 2 and Layer 3 traffic in hardware, and this relies on forwarding entries being recorded into the FIB. The 16,000 IPv4 entries or 8,000 IPv6 entries is because of limited FIB memory. It's, typically, a switch limitation. Mark.