Vlan Routing; Vlan Ip Commands - Dell Force10 S2410-01-10GE-24P Configuration Manual

VLAN Routing

This section introduces the basic commands for enabling VLAN routing and then provides examples for
enabling VLAN routing over the OSPF and RIP protocols, in the following sections:
• VLAN Routing Configuration on page 263
• VLAN Routing OSPF Configuration on page 264
• VLAN Routing RIP Configuration on page 267
You can configure an S-Series switch with some ports supporting VLANs and some supporting routing.
You can also configure it to allow traffic on a VLAN to be treated as if the VLAN were a router port.
When a port is enabled for bridging (the default) rather than routing, all normal bridge processing is
performed for an inbound packet, which is then associated with a VLAN. Its MAC Destination Address
(MAC DA) and VLAN ID are used to search the MAC address table. If routing is enabled for the VLAN
and the MAC DA of an inbound unicast packet is that of the internal bridge-router interface, the packet
will be routed. An inbound multicast packet will be forwarded to all ports in the VLAN, plus the internal
bridge-router interface if it was received on a routed VLAN.
Since a port can be configured to belong to more than one VLAN, VLAN routing might be enabled for all
of the VLANs on the port or for a subset. VLAN routing can be used to allow more than one physical port
to reside on the same subnet. It could also be used when a VLAN spans multiple physical networks, or
when additional segmentation or security is required.
The next section shows how to configure the S-Series to support VLAN routing and how to use RIP and
OSPF with VLANs. A port may be either a VLAN port or a router port, but not both. However, a VLAN
port may be part of a VLAN that is itself a router port.

VLAN IP Commands

To configure the IP parameters of VLANs, there are many command families. For details on their syntax,
the starting point is the Routing Commands chapter of the SFTOS Command Reference:
• For IP routing, use
• Multicast: For IP multicast, use [
Protocol (DVMRP), use [
last-member-query-count
Command Reference.
• IP OSPF commands, such as
chapter in the SFTOS Command Reference.
• IP PIM-DM commands (Protocol Independent Multicast—Dense Mode) commands, such as
mode
commands, are in the PIM Commands chapter in the SFTOS Command Reference.
• RIP commands, such as
262 | Layer 3 Routing
and
ip address
]
no ip dvmrp metric
, and others detailed in the IP Multicast Commands chapter in the SFTOS
ip ospf
and ip pimdm query-interval
ip rip , are in the RIP Commands chapter in the SFTOS Command Reference.
.
ip vrrp
no ] ip mcast boundary . For Distance Vector Multicast Routing
. For IGMP, use [
and ip ospf areaid
areaid
, and IP PIM-SM (Protocol Independent Multicast—Sparse Mode)
] , [ ]
no ip igmp no ip igmp
, are detailed in the OSPF Commands
ip pimdm