Network Study Site

BGP Peer Templates

2022 June 24

BGP Peer Templates BGP Peer Templates provide flexibility in grouping, assigning and hierarchically linking BGP configurations for multiple neighbors. Peer Templates provide a framework for configuring BGP in an organized way. Two types of templates are used, peer-session and peer-policy templates ...

Floating Static Route

2022 June 22

Floating Static Route The objective of a floating static route is to provide an alternative path in case the primary path fails. A floating route is a backup static route with a manually configured AD. The AD of a floating route is higher than the AD of the primary route. Thus, by default a floating route is not installed in the routing table ...

BGP Backdoor Route

2022 June 20

BGP backdoor route The BGP backdoor route feature provides the ability to change the eBGP default Administrative Distance (AD) of 20. In practice, this is useful when identical routes are received with different ADs. For example, one route is received through eBGP (AD 20), and another identical route is received through OSPF (AD 110) ...

BGP Peer Groups

2022 June 14

BGP Peer Groups A BGP Peer Group is a feature designed to optimize system resources when processing BGP updates while also simplifying BGP configuration tasks. BGP neighbors can be assigned to the same BGP Peer Group if they have identical outbound policies. In other words, if multiple BGP neighbors ...

BGP Route Summarization

2022 June 12

BGP Route Summarization Route summarization decreases the size of the routing table, lowers CPU utilization, and can improve network stability. BGP route summarization has multiple options to accommodate the specific functions of the protocol. BGP is the routing protocol of the internet ...

BGP Route Reflector

2022 June 8

BGP Route Reflector An iBGP network requires a full-mesh of neighborships between participating routers, and this can restrict scalability. A BGP Route Reflector overrides this requirement, reduces operational overhead, and provides flexibility by distributing routes among iBGP peers grouped into ...

OSPF Cost

2022 Jun 6

OSPF Cost OSPF uses link cost as the metric for calculating the shortest path to a destination. More precisely, a router receives the sum of all costs assigned to outgoing interfaces leading towards a destination. If there are multiple OSPF paths to a destination, a router decides the best path based on the lowest cost ...

OSPF Virtual Link

2022 June 2

OSPF Virtual Link An OSPF Virtual Link enables connectivity between standalone non-backbone areas and the backbone area. This overrides the default requirement, which mandates that all OSPF non-backbone areas must be directly connected to the backbone area. Virtual Links are configured on Area Border Routers ...

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