IP Routing
6-3
8000-A2-GB21-20
November 1997
Pref indicates the measurement of preference of one route to another, if you
have two routes going to the same destination. (The lower the number the
more preferable.) This route is compared to others for the same address.
S/D indicates if the address in the Host/Net field is a source address or a
destination address.
PA (proxy ARP) indicates whether or not the router answers ARP requests
intended for another machine.
For more information about the routing table, see the
HotWire DSLAM for 8540
and 8546 DSL Cards User’s Guide.
MCC Card Static Route Example
The following illustration shows an example of the MCC card routing table.
97-15478-02
Router
135.1.1.2
135.1.2.1
135.1.3.254
DCE
Manager
135.1.1.1
MCC Card
e1a:135.1.2.2
RTU
135.1.3.4
1) 135.1.3.4*
2) 0.0.0.0
135.1.3.1
135.1.2.1
DSL Card
s1b:135.1.3.1
Unnumbered
Interface
Host/Net
Subnet Mask
255.255.255.255
0.0.0.0
Next-Hop Address
S/D (Source/Destination)
dst (destination)
dst (destination)
MCC Routing Table
This entry is automatically generated and does not need to be statically configured. The entry also
automatically activates proxy ARP.
*
In this example, the IP address of the MCC card’s management e1a IP address is
135.1.2.2.
A packet being routed from the RTU to the NMS is routed using route #2
because no routes for the packet (i.e., destination 135.1.1.1) are specified.
Therefore, the default route is used as the next hop address.
A packet sent by NMS to the RTU is routed using route #1 because the
destination IP address of the packet matches the route’s Host/Net/Subnet
entry (135.1.3.4). Therefore, the next-hop address would be the DSL card
(135.1.3.1).
Note also that the router is multihomed so that both the MCC card’s and the
DSL card’s (management domain) subnetworks appear local (i.e., 135.1.2
and 135.1.3).
