Juniper ScreenOS : default route manipulations and redistributions
The default route or “route of last resort” is an important route in most present inter-network connectivity configurations. It contains all public and private routes possible and is responsible for directing traffic to a next hop when no better route is found. In most cases, it is used to allow networks to access the internet, […]
Juniper Screenos : Redundant multi-exitpoint ISP routing failover using multiple vrouters, multiple OSPF areas and eBGP
Introduction As you most likely already know, Juniper screenOS supports a couple of dynamic routing protocols (OSPF, BGP, RIP). These protocols can be used to build very powerful and redundant networks, however there are some screenos specific issues with these implementations, and these issues may introduce a little bit of complexity in the design and […]
Using OSPF on Juniper Netscreen Firewalls
Introduction to OSPF OSPF is a link-state (dynamic) routing protocol that operates within an autonomous system. OSPF falls within the group of Interior Gateway Protocols. Devices that use OSPF will advertise link state information. The devices generate Link State Advertisements (LSA’s) for directly connected links, and will forward LSAs received from other devices to ensure […]