Intro to BGP, Juniper

1. Introduction to Border Gateway Protocol (BGP 4) Version 1.2

43. BGP Open message 0 1 2 3 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 +-+-+-+-+-+-+-+-+ | Version | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | My Autonomous System | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Hold Time | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | BGP Identifier | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Opt Parm Len | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | | | Optional Parameters | | | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

46. UPDATE Message +-----------------------------------------------------+ | Unfeasible Routes Length (2 octets) | +-----------------------------------------------------+ | Withdrawn Routes (variable) | +-----------------------------------------------------+ | Total Path Attribute Length (2 octets) | +-----------------------------------------------------+ | Path Attributes (variable) | +-----------------------------------------------------+ | Network Layer Reachability Information (variable) | +-----------------------------------------------------+ +---------------------------+ | Length (1 octet) | +---------------------------+ | Prefix (variable) | +---------------------------+ 0 1 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ | Attr. Flags |Attr. Type Code| +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

49. BGP Operation Open sent--- Wait for open from peer Current State New State Event Idle Idle 1). Error Connect 2). Start Connect Idle 3). Any other event Connect 4). ConnectRetry Timer Expired Open Sent 5). Transport Protocol Connect Succeeds Active 6). Transport Protocol Connect Fails Open Sent Idle 7). Stop, Open Error, Connection Collision, Hold Timer Expires, or any other event Open Confirm 8). No Errors Active 9). Disconnect Notification

50. BGP Operation Current New Event State State Open Confirm (waiting notification or keepalive – handshake) Established 15). Keepalive Open Confirm Idle 14). Hold Timer Expired, Notification, Disconnect, Stop, or any other event Established Idle 16). Notification, UPDATE Message error Disconnect Notification, Hold Timer Expired, Stop, or any other event Active Open Sent Connect Active Idle 10). Transport Connect Protocol Succeeds 11). ConnectRetry Timer Expired 12). Remote Peer Trying, IP Address Not Expected 13). Any Other Event

92. Presentation and command difference between Juniper and Cisco Juniper no synchronization ( Default behavior ) set policy-options damping cisco set routing-options confederation members set protocols bgp group Cisco cluster show bgp neighbor show bgp summary show route aspath-regex "200" Cisco no synchronization bgp damping bgp confederation bgp cluster-id show ip bgp neighbor show ip bgp summary show ip bgp regexp ^200$

93. http://www.juniper.net Thank you!