Cyrus, Jim B., Dave B.

Beginning Monday (and finishing Tuesday), we cut over to the new CDS core switch.  From the network perspective, this is the last major central change required to support both H1 and H2 installation and is the foundation for implementing everything else remaining.  What is left is to install are the new edge switches that support the vacuum and auxiliary systems, which will likely happen in the coming weeks/months.

The initial cut over took about an hour, and we used the remaining time to clean up cabling and the configurations of the switches that will remain in the near and long term, and to perform testing.  The 'old' cdsnat0 and cdsnat1 have been decommissioned.  cdsnat0 has been replaced by rtr-msr-nat0, which is a PC running the Vyatta open source router system.  It handles the NAT functionality for the CDS control network, and the port forwarding for the limited CDS services available to the open internet.  The functionality of cdsnat1 (which never actually performed any NAT...) in routing between the internal CDS subnets is now provided directly by the Layer 3 core switch, a Cisco Catalyst 4503E/Sup7e.  The core switch also handles forwarding the udp broadcasts from the ops network to the front end network for diaggui/dtt testpoint discovery on port 5355.  Attached to the core switch are all the edge switches that support, for example, the H1 and H2 FE networks, the Ops network, and (for now) what remains of the legacy iLIGO Foundry equipment (running the vacuum and FMCS networks).