Ip Routing - 3Com OfficeConnect 3CP4144 Cli User's Manual

6-4 C 6: M
HAPTER ANUAL

IP Routing

S
ETUP
For SVCs, there is not a fixed VPI/VCI. Instead, a destination address is used to set
up a path through the ATM backbone network when the connection is to be
established.
Currently, the SVC capability is disabled in the OfficeConnect Remote 812.
ATM Category of Service parameters specify characteristics (sometimes called
traffic shaping parameters) for data transmitted from the OfficeConnect Remote
812 to the remote site. They have no effect on data transmitted from the remote
site to the OfficeConnect Remote 812.
The ATM VC information and Category of Service parameters are entered into the
profile using the set vc <vc name> atm command. For PVCs, you must enter VPI
and VCI information for each profile.
set vc name <vc name> atm vci <vci value> vpi <vpi value>
You should have been provided with Category Of Service parameters.
UBR - Unspecified Bit Rate; No limit has been specified for the upstream data
flow.
CBR - Constant Bit Rate; A constant rate has been specified for the upstream
data flow.
The cell rate transmission parameters are used to specify upstream transmission
rates for the particular Category of Service.
PCR - the Peak Cell Rate is the maximum number of cells/second transmitted
over this connection. The Peak Cell Rate is optional for UBR and required for
CBR.
To configure the profile for UBR, use:
set vc <vc name> atm category_of_service unspecifed pcr <cell rate >
To configure the profile for CBR:
set vc <vc name> atm category_of_service constant pcr < cell rate >
where the pcr parameter is used for the constant bit rate that is desired instead of
as the peak cell rate.
If no traffic shaping parameters have been provided you should choose UBR with a
PCR value of 0. The OfficeConnect Remote 812 will attempt to use all of the
upstream bandwidth when transmitting data to the remote site.
The OfficeConnect Remote 812 can be configured as an IP Router to forward
packets between the local LAN interface and one or more Remote Sites.
A forwarding table is maintained which specifies which interface to route an IP
packet based on the destination IP address. Entries in the forwarding table are
both static and dynamic. Static entries are based on the LAN's and remote site's
subnet addresses and user configured static routes. Dynamic entries are added
when RIP is enabled and routes are learned from neighboring routers.