Management; Ip Address Per Connection; Management Ip Address Per Connection - Zhone 100 User Manual

6 Options

Management

IP Address per
Connection
6-14
When optioned with ISDN, NetPath 100 can have three different communications
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 connection
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 NetPath
100 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 NetPath
100 and it will only carry traffic for that NetPath 100. In this arrangement static routing
is typically 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 dy-
namic routing of the management traffic is used, the WAN IP Address must be set
manually because the messages cannot be sent specifically to the NetPath 100 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 retained 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 NetPath 100 via the new IP Address.
2. Upon a T1 line failure the NetPath 100 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
NetPath 100, 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 NetPath 100 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 NetPath 100 has not been
affected by it. This trap will be sent in band with the IP Address of the ISDN dial-
up line.
NetPath 100 User's Manual - Installation Guide 980-001-0210G
June 1999