Understanding OSPFv2 by Example using a WLAN Scenario

In the WLAN Wireless Local Area Network. WLAN is a 802.11 standards-based LAN that the users access through a wireless connection. scenario, the Aruba Mobility Master acts as a default gateway Gateway is a network node that allows traffic to flow in and out of the network. for all the clients, and talks to one or two upstream routers for redundancy. Mobility Master advertises all the user subnet Subnet is the logical division of an IP network. addresses as stub addresses to the routers via LSAs. The following WLAN Wireless Local Area Network. WLAN is a 802.11 standards-based LAN that the users access through a wireless connection. scenarios will help you understand the functioning of OSPFv2 Open Shortest Path First version 2. OSPFv2 is the version 2 of the link-state routing protocol, OSPF. See RFC 2328..

Totally stub areas see only default route and to the areas themselves.

WLAN Topology

Mobility Master (Figure 1) is configured with VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 10 and VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 12 as user VLANs Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN.. These VLANs Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. have clients on the subnets Subnet is the logical division of an IP network., and Mobility Master is the default router for those clients. VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 4 and VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 5 both have OSPF Open Shortest Path First. OSPF is a link-state routing protocol for IP networks. It uses a link-state routing algorithm and falls into the group of interior routing protocols that operates within a single Autonomous System (AS). enabled. These interfaces are connected to upstream routers (Router 1 and Router 2). The OSPF Open Shortest Path First. OSPF is a link-state routing protocol for IP networks. It uses a link-state routing algorithm and falls into the group of interior routing protocols that operates within a single Autonomous System (AS). interface cost on VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 4 is configured lower than VLAN Virtual Local Area Network. In computer networking, a single Layer 2 network may be partitioned to create multiple distinct broadcast domains, which are mutually isolated so that packets can only pass between them through one or more routers; such a domain is referred to as a Virtual Local Area Network, Virtual LAN, or VLAN. 5. The IDs are:

  • Aruba managed device— 40.1.1.1
  • Router 1— 50.1.1.1
  • Router 2— 60.1.1.1

Figure 1  WLAN OSPF Topology

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WLAN Routing Table

View the Mobility Master routing table using the show ip route command:

(host) [mynode] #show ip route

 

Codes: C - connected, O - OSPF, R - RIP, S - static

M - mgmt, U - route usable, * - candidate default

 

Below is the routing table for Router 1:

(router1) #show ip route

 

O 10.1.1.0/24 [1/0] via 4.1.1.1

O 12.1.1.0/24 [1/0] via 4.1.1.1