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3. DSL Card Configuration
8000-A2-GB26-50 April 2001
3-25
Card VNID Table A-E-B
Gives the user the ability to configure Virtual Network IDs (VNIDs) for the entire card.
There are a maximum of 16 entries per 4- and 12-port cards, or 32 entries per 24-port
card. If VNID Tagging is disabled (see
General (General Bridge Parameters) A-E-A
on
page 3-24), only one VNID appears on this screen to be configured.
NOTE: Enabled fields display En. Disabled fields display blank.
Item
– Enter 0 (zero) to add a new record. Or, enter 1–16 (for 4- and 12-port cards) or
1–32 (for 24-port cards) to display configured information for that item number.
VNID
– Enter a VNID between 2–4000 for DSL cards with an Ethernet network interface,
or 2–255 for DSL cards with an ATM network interface (Default = NULL). A space deletes
the current VNID entry and the rest of the values in this row. Do not enter a space if a
message is displayed indicating that any port has this as the active VNID.
Mux Fwd
– Enable/blank (disable) (Default = Enable).
When Mux Fwd is enabled, all upstream traffic is sent out through the 10BaseT
interface on port cards with an Ethernet network interface or through the SAR
interface on port cards with an ATM network interface. Forwarding restrictions are
set by the other parameters on the screen.
When Mux Fwd is disabled, the DSL card forwards traffic based on a destination
MAC address.
Either enabled or disabled, traffic is forwarded on ports having the same VNID
designation.
IP Filter
– Enable/blank (disable) (Default = Disable).
When IP filtering is enabled, the DSL card looks at IP traffic from the subscriber to
authenticate the source IP address.
When IP filtering is disabled, no source authentication check is performed.
IP Scoping
– Enable/blank (disable) (Default = Enable). If Mux Fwd is set to Disable,
then IP Scoping is set to Disable.
When IP Scoping is enabled, Dynamic Host Configuration Protocol (DHCP)
scoping is also enabled and the DSL card intercepts IP ARP and DHCP transaction
messages.
When IP Scoping is disabled, DHCP client entries are not added to the Client table
and non-IP traffic is forwarded. If IP Scoping is enabled, non-IP traffic is not
forwarded.
DHCP clients in one VNID domain can only obtain the IP addresses in one IP subnet, and
the core router’s primary IP address is part of that subnet. As a result, DHCP clients in
one VNID domain cannot be in different subnets. If the DHCP scope falls in a statically
configured subnet, all the dynamic clients will get an IP address in that static subnet. This
assumes that the core router is configured for DHCP relay.
Set this option to Disable if you are using a DSL Router.
VNID Auth
– Enter a VNID number. When VNID Auth is enabled, the DSL port card
authenticates the traffic from the DSL Router.
Domain Name
– Enter the domain name of the Internet Service Provider (ISP)
(30 characters maximum).
Table 3-4. Bridge Options (2 of 5)