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To create traffic descriptor 3, for RTVBR VCs with PCR=150, SCR=75 and MBS=15:
$ create atm trfdesc trfindx 3 RTVBR NOCLP_SCR pcr 150 scr 75 mbs 15
The NOCLP_SCR flag indicates that the traffic parameters are valid for the aggregate flow and
that an SCR is required.
To create a VC using the preceding traffic descriptor:
$ create atm vc intf ifname aal5-2 trfindx 3 vpi 5 vci 52 lowif atm-0
5.6
Configuring Switched Virtual Circuits (SVCs)
The modem supports Switched Virtual Circuits (SVCs) created
through UNI version 3.1 or 4.0 signalling. To create an SVC, first
create a signaling channel for UNI. This is simply a PVC which
usually has the VPI = 0 and VCI = 5.
Create PVC for UNI signaling
$ create atm vc intf ifname aal5-0 vpi 0 vci 5 none
Here, none specifies the encapsulation as none.
To configure UNI signaling to run on this VC, give
the following command:
Configuring UNI
$ create atm uni ifname aal5-0 nplan atmes saddr
0x47000580ffde0000000000010500000000000000 version uni40
The parameter saddr is the ATM address of the modem, while
nplan specifies this address to be an ATM End System type of
address. With ATMES, the address must be specified as a string of
hex bytes. Conversely, the nplan could be specified as ISDN, in
which case the address should be given as a string of decimal digits.
The version parameter specifies the UNI signaling version, which
here, is 4.0. The default version is 3.1.
Signaling ATM Adaptation Layer (SAAL) is a layer in the SVC
signaling stack that provides reliable transfer of signaling messages
between peer UNI entities. If the signaling channel with the remote
host is established, the SAAL status is set to UP, and the following
trap is generated.