What to Do Next
To verify the configuration and current status of all PVCs on a particular interface, you can also use the
show atm vc interface atm
command.
Tip
Configuring a PVC on a Multipoint Subinterface
Creating a multipoint subinterface allows you to create a point-to-multipoint PVC that can be used as a
broadcast PVC for all multicast requests. To create a PVC on a multipoint subinterface, use the following
procedure beginning in global configuration mode:
SUMMARY STEPS
1.
Router(config)#
interface atm slot/subslot/port.subinterface multipoint
2.
Router(config-subif)#
ip address address mask
3.
Router(config-subif)#
no ip directed-broadcast
4.
Router(config-subif)#
pvc
[
name
]
vpi
/
vci
5.
Router(config-if-atm-vc)#
protocol protocol
{
protocol-address
|
inarp
}
broadcast
6.
Router(config-if-atm-vc)#
inarp minutes
7.
Router(config-if-atm-vc)#
encapsulation
{
aal5mux protocol
|
aal5nlpid
|
aal5snap
}
8.
Router(config-if-atm-vc)#
end
DETAILED STEPS
Purpose
Command or Action
Creates the specified point-to-multipoint subinterface on the given port on the specified
ATM SPA, and enters subinterface configuration mode, where:
Router(config)#
interface atm
slot/subslot/port.subinterface
multipoint
Step 1
•
slot
—
Specifies the chassis slot number in the Cisco ASR 1000 Series Router
where the SIP is installed.
•
subslot
—
Specifies the secondary slot of the SIP where the SPA is installed.
•
port
—
Specifies the number of the individual interface port on a SPA.
•
subinterface
—
Specifies the number of the subinterface.
Assigns the specified IP address and subnet mask to this subinterface.
Router(config-subif)#
ip address
address mask
Step 2
(Optional) Disables the forwarding of IP directed broadcasts, which are sometimes used
in denial of service (DOS) attacks.
Router(config-subif)#
no ip
directed-broadcast
Step 3
Configures a new ATM PVC by assigning its VPI/VCI numbers and enters ATM VC
configuration mode. The valid values for
vpi
/
vci
are:
Router(config-subif)#
pvc
[
name
]
vpi
/
vci
Step 4
•
name
—
(Optional) An arbitrary string that identifies this PVC.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS XE
Everest 16.5
OL-14127-17
71
Configuring the ATM SPAs
Configuring a PVC on a Multipoint Subinterface