Configuring ATM, ATM Sub-interface Multipoint
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Cisco IOS Release 2.5.0
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ATM supports two types of interfaces: point-to-point and multipoint.
Point-to-point subinterface--With point-to-point subinterfaces, each pair of devices has its own subnet. If you put the PVC on a point-to-point subinterface, the device assumes that there is only one point-to-point PVC configured on the subinterface. Therefore, any IP packets with a destination IP address in the same subnet are forwarded on this virtual circuit (VC). This is the simplest way to configure the mapping and is therefore the recommended method.
Multipoint networks--Multipoint networks have three or more devices in the same subnet. If you put the PVC in a point-to-multipoint subinterface or in the main interface (which is multipoint by default), you need to either configure a static mapping or enable inverse Address Resolution Protocol (ARP) for dynamic mapping.
ANCP needs to be enabled on ATM interface when message is sent from the DSLAM.
The following commands were introduced or modified:
pvc,
protocol,
cbr,
ubr,
encapsulation
aal5snap,
interface
atm,
ip
address,
inarp,
oam-pvc
manage,
oam-retry,
class-vc,
snmp-server
enable
traps,
vc-class
atm,
class-int,
mtu,
show
atm
class-links,
show
atm
interface
atm,
show
atm
map,
show
atm
pvc,
show
atm
traffic,
show
atm
vc,
show
network-clocks, ancp enable, ancp neighbor.
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IP Multicast over ATM PVC Bundle
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Cisco IOS Release XE 3.7S
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ATM VC bundle management allows you to configure multiple VCs that have different QoS characteristics between any pair of ATM-connected devices.
No new commands were introduced or modified.
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