Step 1 | enable
Example:
Router> enable
|
Enables
privileged EXEC mode.
- Enter your password if
prompted.
|
Step 2 | configure
terminal
Example:
Router# configure terminal
|
Enters global
configuration mode.
|
Step 3 | interface
bundle
n
Example:
Router(config-if)# interface bundle 1
|
Adds the
selected interface to the virtual bundle. If this is the first interface on
which the virtual bundle is configured, this command enables the bundle on the
specified interface.
As many as 40
virtual interface bundles can be configured on the Cisco CMTS. Numeric
identifiers may range from 1 to 255.
|
Step 4 | ip
address
address
mask
Example:
Router(config-if)# ip address 7.7.7.7 255.255.255.0
|
Use as needed
after Cisco IOS upgrade.
Configures
the IP address for the specified interface and virtual bundle.
|
Step 5 | cable helper-address
address
[cable-modem |
host |
mta |
ps
|
stb]
Example:
Router(config-if)# cable helper-address 10.10.10.13
|
(Optional)
Specifies the IPv4 DHCP server address.
|
Step 6 | cable dhcp-giaddr
{primary |
policy [host |
stb |
mta |
ps
|
strict]}
Example:
Router(config-if)# cable dhcp-giaddr policy host
|
Sets the
DHCP GIADDR field for DHCP request packets.
|
Step 7 | cable source-verify
dhcp
Example:
Router(config-if)# cable source-verify dhcp
|
(Optional)
Ensures that the Cisco CMTS allows network access only to those IP addresses
that DCHP servers issued to devices on this cable interface. The Cisco CMTS
examines the DHCP packets that pass through the cable interfaces to build a
database of which IP addresses are valid on which interface. Drops traffic from
all devices with unknown IP addresses, but the Cisco CMTS also sends a query to
the DHCP servers for any information about the device. If a DHCP server informs
the Cisco CMTS that the device has a valid IP address, the CMTS then allows the
device on the network.
|
Step 8 | no cable
arp
Example:
Router(config-if)# no cable arp
|
(Optional)
Blocks the static IPv4 CPE from coming online. Also blocks Address Resolution
Protocol (ARP) process destined to devices on the cable network.
Note
|
Use this
command, together with the
cable source-verify
dhcp command, to block certain types of scanning attacks that
attempt to cause denial of service (DoS) on the Cisco CMTS.
|
|
Step 9 | exit
Example:
Router(config-if)# exit
|
Exits the
interface configuration mode and enters global configuration mode.
|
Step 10 | interface
cable
slot
/subslot/port
Example:
Router(config)# interface cable 3/0/0
|
Enters
interface configuration mode for the selected interface, on which virtual
interface bundling is to be enabled.
|
Step 11 | cable
bundle
n
Example:
Router(config-if)# cable bundle 1
|
Configures a
cable interface to belong to an interface bundle, where
n
is the bundle number.
|
Step 12 | no
cable
upstream
n
shut
Example:
Router(config-if)# no cable upstream 4 shut
|
Use as
needed after Cisco IOS upgrade.
The cable
interface must be enabled using the no shutdown command for the specified cable
interface.
n
—Specifies the cable interface to enable for the
virtual bundle.
|
Step 13 | end
Example:
Router(config-if)# end
|
Returns to
privileged EXEC mode.
|