As part of our upgrade plans which include our own DSL and leased line network, We will be adding 2 new Cisco 6509 devices in to our core network. This work involves bring up new BGP sessions and moving Fiber interconnects between core devices.
No impact is expected to be seen while bring up new BGP sessions between devices, However routing changes and network instability will be seen for a short period while we relocate interconnects and re-coverage our routing tables to reflect the new interconnect locations.
This work forms only part of the full scope of works and other maintenance windows will be booked to relocate other interconnects and re-purpose existing core devices to access nodes.
UPDATE 01 – 23:55
Primary interconnects have been relocated, however we have not re-enabled the sessions due to a potential problem. Works will continue tomorrow in a limited fashion and they will be re-enabled outside of hours.
UPDATE 02 – 22/03/2015 – 20:51
Works to re-enable establish new internal BGP sessions is complete. Works to re-enable our external BGP sessions via these news cores is complete, However will require reconfiguration at a later date once CORE-2 is online.