eG Monitoring
 

Measures reported by CiscoBGPStatusTest

BGP (Border Gateway Protocol) is an interdomain routing protocol designed to provide loop-free routing links between separate routing domains that contain independent routing policies (autonomous systems). BGP is designed to run over a reliable transport protocol; it uses TCP (port 179) as the transport protocol because TCP is a connection-oriented protocol. BGP uses a router ID to identify BGP-speaking peers. The BGP router ID is a 32-bit value that is often represented by an IPv4 address. The BGP router ID must be unique to the BGP peers in a network. A BGP-speaking device does not discover another BGP-speaking device automatically. A network administrator usually manually configures the relationships between BGP-speaking devices. A peer device is a BGP-speaking device that has an active TCP connection to another BGP-speaking device. This relationship between BGP devices is often referred to as a neighbor. When a TCP connection is established between peers, each BGP peer initially exchanges all its routes - the complete BGP routing table -with the other peer.

This test auto-discovers the BGP neighbors connected to the target Cisco Router and for each BGP neighbor, reports the current status and the messages transmitted and received through each BGP neighbor. This way, administrators may be alerted to the BGP neighbor that is busy processing messages.

Outputs of the test : One set of results for every source host.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Status Indicates the current status of this BGP neighbor.   BGP forms a TCP session with neighbor routers called peers. BGP uses the Finite State Machine (FSM) to maintain a table of all BGP peers and their operational status.

The values reported by this measure and its numeric equivalents are mentioned in the table below:

Measure Value Numeric Value
Idle 1
Connect 2
Active 3
Open present 4
Open confirm 5
Established 6

Note:

By default, this measure reports the Measure Values listed in the table above to indicate the current status of each BGP neighbor. The graph of this measure however, is represented using the numeric equivalents only.
Message_rcvd Indicates the number of messages received by this BGP neighbor. Number Comparing the value of these measure across the BGP neighbors will help you identify the BGP neighbor that is busy processing messages.
Message_txmtd Indicates the number of messages transmitted through this BGP neighbor. Number