On Wednesday, January 08, 2014 09:45:50 PM excel...@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.
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