New features – general purpose
The base Linux OS is Debian 10 and the Linux Kernel is updated in this release to Version 5.4 (LTS).
Protocol dependent mappings for SNAT
SNAT maps from an internal source address and ID (where ID can be a port number) to an external address and ID, by allocating these from a given pool.
This feature adds support for three separate pools (rather than a single shared pool). One pool will be used for assigning TCP ports, another for assigning UDP ports, and the third one for ICMP and other protocols.
Conditional BGP advertisement (IPV4 & IPV6)
This feature allows a BGP speaker to advertise a set of BGP routes or withdraw the set of routes using route-maps.
BGP best external route
This feature allows a BGP backup path to be advertised for an eBGP learned path to an iBGP peer, when the internal best path was learned from the internal peer.
The advertising of the best external route can be done via a full mesh of iBGP peers, or using diverse paths via Route Reflectors.
BGP Nexthop tracking
BGP mantains a nexthop cache which is refreshed every minute with the current RIB state, where a change in state is applied to the BGP RIB.
This feature allows BGP to register the BGP nexthops with the RIB, where any change in the reachability or meta data related to the nexthop is notified to BGP. BGP is then able to apply the event change without having to poll the RIB, thus improving BGP convergence.
Provide CLI to clear OSPF per-interface counters
Provision of an operational command to clear the OSPF interface counters. Corresponding show interface output is extended to include a timestamp of when the counters were last cleared.
This feature provides the ability to filter 'show log' output based on time, clear stored system logs, and to configure the amount of storage used for the system logs.