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SR655 1 x EPYC 7302P, 64GB RAM, 2G CONTROLLER CACHE FLASH, 4x10G ports + SFP+ and 4x1G ports, 3 SSD 480GB MAINSTREAM, XCLARITY ENTERPRISE.

SR655 AMD EPYC 7302P (16C 2.8GHz 128MB Cache/155W) 32GB (2x32GB, 2Rx4 3200MHz RDIMM), No Backplane, SATA, 1x750W, Tooless Rails
ThinkSystem 2x32GB TruDDR4 3200MHz (2Rx4 1.2V) RDIMM-A
ThinkSystem SR655 2.5 SATA/SAS 8-Bay Backplane Kit
ThinkSystem RAID 930-8i 2GB Flash PCIe 12Gb Adapter
ThinkSystem 2.5 5300 480GB Mainstream SATA 6Gb Hot Swap SSD
ThinkSystem SR655 x16/x8/x8 PCIe Riser1 FH Kit
ThinkSystem SR635/SR655 x8 PCIe Internal Riser Kit
ThinkSystem Broadcom 57454 10/25GbE SFP28 4-port OCP Ethernet Adapter
ThinkSystem Broadcom 5720 1GbE RJ45 2-Port PCIe Ethernet Adapter
SFP+ SR Transceiver
ThinkSystem 750W(230/115V) Platinum Hot-Swap Power Supply
2.8m, 10A/100-250V, C13 to IEC 320-C14 Rack Power Cable
ThinkSystem Toolless Slide Rail Kit with 2U CMA
ThinkSystem SR655 Fan Option Kit
ThinkSystem SR635/SR655 Supercap Installation Kit

RR is a specific component inside a service provider environment:

• The BGP RR is not in the data path inside the backbone, this can be adjusted by setting hight IGP metrics inside the code backbone. 
• BGP traffic does not require a tremendous throughput so no need to have hardware NIC assisted forwarding mechanism such as dpdk.
• A NREN route reflector with 2xIPv4 and 2xIPv6 full views coming from 2 upstream provider requires steady ~ 10 Mbps traffic rates, so we can assume that 10GE connection will be sufficient for the next decades all address-family included.
• As of 2020/07/13, the Internet IPv4 routing table size is 839945 entries
• As of 2020/07/13, the Internet IPv6 routing table size is 91062 entries

both cumulated with BGP other address families needs a constant usage of ~ 4GB of memory:

# show watchdog memory

• So in the config above 64 Gbytes of RAM is sufficient in order to cache all the IPv4 and IPv6 routing table in memory (and also other BGP address family BGP tables). It will be also largely enough in case of network instability, events that involves more CPU/memory usage related convergence computation.

• We have no incentive in proposing a server with the above brand. It just happen that this server was already bought and its configuration is matching perfectly the use case requirement but again, this is pure coincidence
• 10GE port connection might be overkill, but in a Service Provider context this is the norm. It will avoid adjacent core routers to implement 1GE connectivity
• PCIe GEN4 is available, and thus provide a tremendous amount of bandwidth for disk R/W operation. Though useful for the OS application, BGP RR setup won't take a direct advantage from PCIE GEN4.
• Indeed in this configuration considering the amount of RAM we have we will disable SWAP operations.