Enterasys 6000 Guida Utente
Appendix A
Subscriber Addressing
Connections between subscribers are made over either switched virtual circuits
(SVCs) or permanent virtual circuits (PVCs). An SVC is established by successful
transmission and acceptance between subscribers of a Call Request, and broken by
successful transmission and acceptance of a Clear Request. A PVC is established auto-
matically on power-up of both subscribers (assuming both subscribers' nodes are oper-
ational).
(SVCs) or permanent virtual circuits (PVCs). An SVC is established by successful
transmission and acceptance between subscribers of a Call Request, and broken by
successful transmission and acceptance of a Clear Request. A PVC is established auto-
matically on power-up of both subscribers (assuming both subscribers' nodes are oper-
ational).
Subcriber ID records contain the subscriber addresses that are placed in call packets,
as well as information that links the subscriber with a specific serial port in a Netlink
FRX4000, FRX6000, or Frame Relay Module. Each record also defines routing for
calls to the subscriber.
as well as information that links the subscriber with a specific serial port in a Netlink
FRX4000, FRX6000, or Frame Relay Module. Each record also defines routing for
calls to the subscriber.
Each SVC subscriber is identified by an ID, or address, of up to 15 digits.
Subscribers using a public data network (PDN) must conform to the format used by
the PDN. For example, CCITT Recommendation X.121 specifies this format: a one-
digit international code, followed by a four-digit Data Network Identification Code
(DNIC), followed by up to 10 digits of Network Terminal Number (NTN).
the PDN. For example, CCITT Recommendation X.121 specifies this format: a one-
digit international code, followed by a four-digit Data Network Identification Code
(DNIC), followed by up to 10 digits of Network Terminal Number (NTN).
A private network (that will not communicate with other networks) does not need to
follow the format—any or all of the digits can be used as desired, following the guide-
lines in this chapter.
follow the format—any or all of the digits can be used as desired, following the guide-
lines in this chapter.
Wildcards in Subscriber Addresses
Each subscriber is assigned to an FRX/FRM port, and more than one subscriber device
can use a port. To eliminate the need to specify the complete ID of every subscriber
on the port, the question mark and the asterisk (* - also called “star”) can be used as
“wildcard” characters.
can use a port. To eliminate the need to specify the complete ID of every subscriber
on the port, the question mark and the asterisk (* - also called “star”) can be used as
“wildcard” characters.
A question mark in an address matches any single digit. For example,
3110??????????
is any 14-digit address that begins with
3110
.
An asterisk matches any combination of digits, including none at all. For example,
3110*00
is any address that starts with
3110
and ends with
00
, including
311000
(but not
31100
—overlapping is not allowed). Note that
*
by itself is very important, because it
matches any address.
Wildcards can be combined. The address
3110??*
is any address beginning with
3110
and containing at least two more digits.