Address "portability"

Jim Fleming JimFleming at
Fri Mar 22 01:14:38 UTC 1996

On Thursday, March 21, 1996 7:13 AM, Bill Manning[SMTP:bmanning at] wrote:
@> What is the general consensus of this group regarding the "portability" of 
@> addresses in the 204/8 and 205/8 range?  
@	All address prefixes are portable. Their routability by any
@	given transit provider is always suspect and varies from time
@	to time.
@	This nomenclature has been foisted on the unsuspecting by well
@	intentioned people. This idea fosters the myth of global 
@	reachability for any given prefix.

WWW.ISI.EDU Has a New IP Address!


As of March 21, 1996 10:30PDT, the ISI web server has a new IP address. If you have reached this page, it is because of one of the following reasons:

1.You have referred to by its IP address, which has changed to, 2.You have referenced and your Domain Name Service still has the old IP address. If this symptom persists after a resonable amount of time, please contact your system administrator with the information from number 1. 3.You have made some other reference that does not point to our new web server. 

To get to our new server, use: if you landed here using the old IP address

or if you've already tried (see reason number 2 above). 

Please make a note of this change. 
Comments and Questions regarding this site may be sent to action at 


# ping
PING VENERA.ISI.EDU ( 56 data bytes
64 bytes from icmp_seq=0 ttl=246 time=90.023 ms
64 bytes from icmp_seq=3 ttl=246 time=80.949 ms
64 bytes from icmp_seq=4 ttl=246 time=85.716 ms
64 bytes from icmp_seq=5 ttl=246 time=80.661 ms
64 bytes from icmp_seq=6 ttl=246 time=86.847 ms
--- VENERA.ISI.EDU ping statistics ---
7 packets transmitted, 5 packets received, 28% packet loss
round-trip min/avg/max = 80.661/84.839/90.023 ms


Portability in looks like IANA has moved 12 doors down the street...

Jim Fleming
UNETY Systems, Inc.
Naperville, IL 60563

e-mail: JimFleming at

More information about the NANOG mailing list