NSFNET T1 backbone routing configuration changes
Fri Jun 5 05:59:55 UTC 1992
Hi. The T1 backbone routing software allows up to 1200 routes to
be configured at any metric per NSS. We reached this limit a while
back at several sites. With the May 12 update, we made the
following adjustments to the T1 backbone routing database in order
to stay within the 1200 route per unique metric per NSS limit and
to provide future space:
NSS 8 moved 745 nets with AS 756 (T1-T3 Network Interconnect
(Princeton, NJ) metric 11 to metric 17.
NSS 9 moved 558 nets with AS 184 (Milnet (FIX-East)) metric 1 & 2,
to AS 184 metric 7 & 8.
NSS 10 moved 208 nets with AS 590 (EASInet Regional Network) metric 1
to metric 7.
NSS 13 moved 558 nets with AS 164 (Milnet (FIX-West)) metric 1 & 2,
to AS 164 metric 7 & 8.
NSS 17 moved 745 nets with AS 750 (T1-T3 Network Interconnect
(Ann Arbor, MI)) metric 10 to metric 16.
While these changes are transparent to backbone routing, it was
brought to our attention that they may affect sites which use the
nis.nsf.net reports to generate access lists, etc. So, we will
keep this list informed as these reconfigurations become necessary
in the future.
Also, metric 7 is only being used as a first priority metric in the T1
backbone routing database as of today's routing config update.
More information about the NANOG