Citrix NetScaler EE, Installation And Configuration Manual

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12. In the Dead Int erval Dead Int erval field, enter the amount of time to wait to receive a Hello protocol packet before marking a
router as dead (40 seconds is the default).
13. Click Apply Apply to save your changes.
Stub Area
Stub areas are shielded from external routes and receive information about networks that belong to other areas of the
same OSPF domain.
Enable the St ub Area St ub Area check box.
BGP is an inter-autonomous system routing protocol. An autonomous network or group of networks is managed under a
common administration and with common routing policies. BGP is used to exchange routing information for the Internet
and is the protocol used between Internet Service Providers (ISPs). Customer networks deploy an Interior Gateway
Protocol (IGP) such as RIP or OSPF for the exchange of routing information within their networks. Customers connect to
ISPs, and ISPs use BGP to exchange customer and ISP routes. When BGP is used between Autonomous Systems (AS), the
protocol is called External BGP (EBGP). If a service provider is using BGP to exchange routes within an AS, then the protocol
is called Interior BGP (IBGP).
BGP is a robust and scalable routing protocol deployed on the Internet. To achieve scalability, BGP uses many route
parameters called attributes to define routing policies and maintain a stable routing environment. BGP neighbors exchange
full routing information when the TCP connection between neighbors is first established. When changes to the routing
table are detected, the BGP routers send to their neighbors only those routes that have changed. BGP routers do not send
periodic routing updates, and advertise only the optimal path to a destination network. You can configure NetScaler SD-
WAN appliances to learn routes and advertise routes using BGP.
To configure BGP:
1. In the Conf igurat ion Edit or Conf igurat ion Edit or, navigate to Connect ions Connect ions
→
[Sit e Name] [Sit e Name]
→
Rout e Learning Rout e Learning
→
BGP BGP
→
Basic Basic
Set t ings Set t ings and click the Edit Edit icon.
2. Click the Enable Enable checkbox and the Advert ise Net Scaler SD-WAN Rout es Advert ise Net Scaler SD-WAN Rout es checkbox if you want to advertise
NetScaler SD-WAN Routes. Enter an optional Rout er ID Rout er ID, and enter the number of the Local Autonomous System to
learn routes from and advertise routes to in the Local Aut onomous Syst em Local Aut onomous Syst em field. The routes advertise or redistribute
the SD-WAN virtual path routes to peer routes with whom adjacency or peering is established so that the peer routes
are aware of being able to reach those network prefixes through the SD-WAN network.
3. Click Apply Apply to enable BGP.