Operation Manual
6 Options
980-001-0240B FrameSaver NP 110 User’s Manual - Installation Guide 6-35
November 2000
Management
IP Address per
Connection
When optioned with ISDN, FrameSaver NP 110 can have three different communica-
tions paths that allow it to connect to the frame relay network in different places. They
are CSU, ISDN dial up Phone # 1 and ISDN dial up Phone #2. Each of these connec-
tion points could result in the management PVC routing through different IP sub-nets
to reach the NCC (Network Control Center), or it may be desirable to have the Frame-
Saver NP 110 appear as a logically different object in the SNMP manager, especially
if static routing and dedicated backup ports are utilized.
The WAN IP address to be used on the T1 link is automatically “learned” from the first
valid IP message received over the unit’s dedicated management PVC. Learning will
take place as long as the value of the CSU IP Address in NVM (Non-Volatile Memory)
is 000.000.000.000.
This approach is practical because the management PVC is dedicated to one NP 110
and it will only carry traffic for that NP 110. In this arrangement static routing is typi-
cally used, and the first message is either a manual PING initiated by an NCC operator
or an automatic status POLL from the SNMP manager. In networks where dynamic
routing of the management traffic is used, the WAN IP Address must be set manually
because the messages cannot be sent specifically to the FrameSaver NP 110 until it has
established communications with its boundary router. This is done through the console
port either locally or via VT 100 dial up. Once the IP Address is set or learned it is re-
tained and used until the NVM is cleared or another address is manually set.
The IP Address to be used on each of the ISDN dial up phone numbers can be estab-
lished using two different options. The first option functions identically to the CSU
line described above. The IP Address will be automatically learned when the NVM
value is 000.000.000.000. Once learned or set it will not be changed.
The second option is to learn the address on each dial up connection. In this case, after
the connection is made, the OOB PPP (Out-Of-Band Point-to-Point Protocol) trap in-
dicating the CSU failure is sent, and communication is established with the frame relay
network, the learn function will be enabled. Upon receiving a good IP message the ad-
dress will be stored in the NVM and displayed on the ISDN configuration display. This
can be examined at any time, as the address will remain in the display until a new ad-
dress is learned.
NOTES:
1. Resetting the IP Address will momentarily disrupt all management IP-level traffic
and potentially cause the loss of some messages. If the IP Address is set to a new
address via a Telnet session it will break that session and require the operator to
reconnect to the FrameSaver NP 110 via the new IP Address.
2. Upon a T1 line failure the FrameSaver NP 110 will (if so configured) create and
send an OOB PPP trap indicating the problem(s). This will be sent with the IP
Address used for the CSU line. If ISDN dial backup is automatically initiated by
the FrameSaver NP 110, the system will not change its IP Address to the one
associated with the ISDN dial line until the OOB PPP trap is complete or it has
timed out. This should occur in less than two minutes using the default settings.
3. If a T1 failure is corrected while the FrameSaver NP 110 is on ISDN dial backup,
a clear trap will be sent indicating the problem is resolved. This trap will be sent
“in band” via the ISDN line and have the IP Address of the dial up line. This
address may be different than the address the failure trap was reported on.
4. While on dial backup if the T1 clears and fails again, another failure trap will be
sent indicating the current problem, even though the FrameSaver NP 110 has not
been affected by it. This trap will be sent in band with the IP Address of the ISDN
dial-up line.