Chapter 17
| General IP Routing
Configuring IP Routing Interfaces
– 672 –
Routing Protocols The switch supports both static and dynamic routing.
◆ Static routing requires routing information to be stored in the switch either
manually or when a connection is set up by an application outside the switch.
◆ Dynamic routing uses a routing protocol to exchange routing information,
calculate routing tables, and respond to changes in the status or loading of the
network.
Configuring IP Routing Interfaces
Configuring Local and
Remote Interfaces
Use the IP > General > Routing Interface (Add Address) page to configure routing
interfaces for directly connected IPv4 subnets (see “Setting the Switch’s IP Address
(IP Version 4)” on page 619. Or use the IP > IPv6 Configuration pages to configure
routing interfaces for directly connected IPv6 subnets (see “Setting the Switch’s IP
Address (IP Version 6)” on page 624).
If this router is directly connected to end node devices (or connected to end nodes
through shared media) that will be assigned to a specific subnet, then you must
create a router interface for each VLAN that will support routing. The router
interface consists of an IP address and subnet mask. This interface address defines
both the network prefix number to which the router interface is attached and the
router’s host number on that network. In other words, a router interface address
defines the network segment that is connected to that interface, and allows you to
send IP packets to or from the router.
You can specify the IP subnets connected directly to this router by manually
assigning an IP address to each VLAN, or using BOOTP or DHCP to dynamically
assign an address. To specify IP subnets not directly connected to this router, you
can either configure static routes (see page 681), or use RIP, OSPF, OSPFv3
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, or
BGPv4
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dynamic routing protocols to identify routes that lead to other interfaces
by exchanging protocol messages with other routers on the network.
Once IP interfaces have been configured, the switch functions as a multilayer
routing switch, operating at either Layer 2 or 3 as required. All IP packets are routed
directly between local interfaces, or indirectly to remote interfaces using either
static or dynamic routing. All other packets for non-IP protocols (for example,
NetBuei, NetWare or AppleTalk) are switched based on MAC addresses).
To route traffic between remote IP interfaces, the switch should be recognized by
other network nodes as an IP router, either by setting it to advertise itself as the
default gateway or by redirection from another router via the ICMP process used by
various routing protocols.
If the switch is configured to advertise itself as the default gateway, a routing
protocol must still be used to determine the next hop router for any unknown
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