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Configuring IP Routing
Introduction to IP routing on the MAX
MAX 6000/3000 Network Configuration Guide 9-5
Figure 9-3. Typical routing table
At startup, a MAX unit creates the interfaces in the following list, which are represented in the
sample routing table in Figure 9-3.
WAN IP interfaces
A MAX unit creates WAN IP interfaces as they are brought up. WAN IP interfaces are labeled
wanN, where N is a number assigned in the order in which the interfaces become active. The
WAN IP address can be a local address assigned dynamically when the caller logs in, an
address on a subnet of the local network, or a unique IP network address for a remote device.
Assignment of interface addresses depends on whether you use system-based routing or
interface-based routing.
Interface Description
Ethernet IP Always active, because it is always connected. You assign its IP
address in Ethernet > Mod Config > Ether Options.
The MAX creates two routing table entries: one with a destination of
the network (ie0), and the other with a destination of the MAX host
(local).
Black-hole (bh0) Always up. The black-hole address is 127.0.0.0. Packets routed to this
interface are discarded silently.
Loopback (local) Always up. The loopback address is 127.0.0.1/32.
Reject (rj0) Always up. The reject address is 127.0.0.2. Packets routed to this
interface are discarded and an ICMP host unreachable message is sent
to the source address.
Multicast Have a destination address with a value of 224 for the first octet. (For
information about multicast addresses, see Chapter 10, “Setting Up IP
Multicast Forwarding.”)
Inactive
(wanidle0)
(Not shown in the example.) When WAN connections are down, all
routes point to the inactive interface. The MAX creates this interface
when you configure a Connection profile.
** Ascend MAX Terminal Server **
ascend% iproute show
Destination Gateway IF Flg Pref Met Use Age
10.10.0.0/16 - ie0 C 0 0 3 222
10.10.10.2/32 - local CP 0 0 0 222
127.0.0.0/8 - bh0 CP 0 0 0 222
127.0.0.1/32 - local CP 0 0 0 222
127.0.0.2/32 - rj0 CP 0 0 0 222
224.0.0.0/4 - mcast CP 0 0 0 222
224.0.0.1/32 - local CP 0 0 0 222
224.0.0.2/32 - local CP 0 0 0 222
224.0.0.5/32 - local CP 0 0 0 222
224.0.0.6/32 - local CP 0 0 0 222
224.0.0.9/32 - local CP 0 0 0 222
255.255.255.255/32 - ie0 CP 0 0 0 222