BGP Finite State Machine: Troubleshooting

(See page 108 of the Halabi book for a diagram).

1. Idle

Waiting for Start event, normally initiated by the operator (establishing new BGP session or resetting an existing session). After errors, BGP falls back to the Idle state.

After a Start event, BGP initializes, resets connect retry timer, initiates TCP transport connection, and listens for connections initiated by a remote peer.

2. Connect

BGP is waiting for a transition protocol connection to complete. If TCP transport succeeds, transition to State 4, OpenSent, and send OPEN. If not, transition to Active. If the connect retry timer expires, remain in Connect, reset the timer, and initiate a transport connection. In case of any other event, transition back to Idle.

LHG 60G Access Point  The following figure describes how to configure the Access Point.

The features that the LHG60 possesses are compact in size and simple to install, making it the main choice for price performance.

LHG 60 Features

The main features of the LHG 60 are indicated below. We can see that it is mainly designed for low budget and high rate network infrastructures.

• 1Gbit full duplex (wire speed)
• Works in the 60GHz spectrum
• Familiar LHG design
• Quad-core ARM CPU
• Low cost and low weight
• Longer distance than 100m

The settings made by the Access Point are shown in the illustrations.

Error:

When clients attempt to connect to the database, they can not connect with the error “ORA-12502: TNS: listener received no CONNECT_DATA from the client”.

Now we will try to find out both the causes and how to solve this problem.

Reason:

Missing host definition in the local_listener parameter.

Solution:

The definition in the local_listener parameter should be changed as follows.

Missing Host Definition:

(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = node-VIP) (PORT = 1521))))

Correct Host Definition:

(DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP) (HOST = node-vip.domain.local) (PORT = 1521))))

If the database is RAC, the definition of sid = ‘XX’ should also be added.

How to share internet connection from WiFi or PC Modem via LAN (Ethernet) can be done easily in Windows 7 and Windows 8. How to share internet connection can be done without additional software, or use a program from Windows called Internet Connection Sharing (ICS).

To be able to share internet connection via LAN in Windows 7 and Windows 8 please follow the following Tutorial:

How to Share Internet Connection (WiFi / Modem) via LAN (Ethernet) Windows 7:

1. Click Start -> Search with keyword “view network connections” -> enter

Introduction

When a site is implementing new router connectivity, it is useful to work from a configuration template to enhance productivity. This is particularly important in large-scale Frame Relay networks because auditing and altering router configurations to obtain consistency between hundreds of routers can be very tedious and time-consuming.

It is also useful for established sites to occasionally audit their router configurations to verify they are configured consistently, and that they are making best use of management and security features on the routers.