We are pleased to announce FRR 7.4. Thank you to all contributors.

Major additions in this release include:

• Segment Routing support for IS-IS
• BGP Graceful Restart
• BGP link bandwidth extended community support
• Full support for Python 3 (all platforms except Centos 6)

As of this release, we no longer accept patches via our mailing list.

Debian Packages - https://deb.frrouting.org/ RPM Packages - https://rpm.frrouting.org/ Snaps - https://snapcraft.io/frr

Changelog

Major Behavior Changes

• RFC 8212 is now enabled by default. BGP will not advertise or use routes unless explicitly configured to do so with an export or import policy.

All daemons:

• Performance improvements for route-maps

bfdd

• Improve debugging capabilities
• Fixes for VRF support
• Fix tx of garbage stack data in BFD packets
• Fix transmission timer calculation to match RFC 5880

bgpd

• Added additional information to EVPN JSON output
• Added ability to display large communities in default VRF
• Added ability to use add/subtract semantics for local-preference in route-maps
• Added ability to match on IPv4 nexthops in route-maps
• Added log message when router ID collision occurs during session bringup
• Added command to show listener sockets
• Added JSON support for statistics command
• Added statistics command for L2VPN EVPN address family
• Added support for link bandwidth extended community
• Added support for RFC 7607
• Added support for RFC 6286
• Added support for graceful restart
• Added support for SRv6 VPNv4 Prefix SID subtypes 4 and 5
• Added ability to set dampening on address families other than IPv4 unicast
• PfxSnt column in peer display output now reads "(Policy)" when no eBGP policy is set
• Number of prefixes sent is now shown when displaying AFI/SAFI information
• Static redistributed routes are no longer suppressed due to martian nexthop
• RFC 8212 is now enabled by default
• Ingress packet queue in peer display now reflects reality instead of a hardcoded 0
• Weighted ECMP is now used when multipaths have link bandwidth information
• Allow overriding ORIGIN attribute for aggregate-address
• Improved BFD handling in event of peering failure
• Improved status messages for peers who fail to establish
• Indicate that prefix is malformed if aggregated by AS0 when showing prefix
• Malformed extended and large community attributes are now handled with treat-as-withdraw strategy, per RFC 7606
• Ignore aggregator attribute if it is 0.0.0.0, per RFC 7606
• Zero-length cluster list attributes are now handled with treat-as-withdraw strategy
• Malformed EVPN Type-5 messages have improved treat-as-withdraw handling
• UPDATE messages with global nexthop set to :: are no longer discarded
• Static default route is no longer withdrawn when configuring default-originate
• Deleting numbered peers now always disables RAs for them
• Fix memory leak when parsing OPEN messages containing multiple oddly formatted FQDN capabilities
• Fix memory leak in some EVPN JSON show commands
• Fix handling of Flowspec NLRIs longer than 240 bytes
• Fix various Flowspec issues
• Fix rare crash when asking Zebra to send RA on our behalf
• Fix rare crash when issuing clear
• Fix handling of source instance router-id update when using route leaking
• Fix SNMP & BMP reporting of whether a session just went to Established
• Fix various memory issues

isisd

• Initial segment routing support per draft-ietf-isis-segment-routing-extensions-25
• Circuits are no longer destroyed when the underlying interface is deleted
• Support MTUs up to 16k (previous max was 8k)
• Fix issues with reloading hello-interval command

ldpd

• Add support for LDP ordered label distribution
• Ingress packets coming through broken LSP are no longer dropped
• Reloading configs after removing address-family blocks now works
• ACL rule modifications are now respected
• Correct DSCP byte is now set for both sides of LDP peering

nhrpd

• Added MTU and hold time to resolution request CIE, per RFC 2332
• Added JSON support for some commands
• Fix netlink handling for lladdr messages
• Fix integer underflow

ospfd

• Fix incorrect range check on metric values
• Fix UAF upon RX of self-originated LSA
• Fix length checks when validating RX'd LSAs
• Fixes for multi-instance OSPF

ospf6d

• Fix infinite loop when multiple ABRs acting as ASBRs in the same area were present

pbrd

• Allow deconfiguring table ranges
• Fix reloading failures around VRF related config
• Improve handling of set and match statements in pbr-map

pimd

• Add rpAddress key to JSON output for PIM rp-info
• Add support for setting IGMP group count watermarks
• Add no ip msdp mesh-group command to remove mesh groups
• JSON output for IGMP groups now lists groups in an array
• Drop JOIN, HELLO and ASSERT messages not destined for all-pim-routers address
• Change all JSON keys for BSM-related output to camelCase
• Fix incorrect BSR election
• Fix various VXLAN issues
• Fix various BSM issues
• Fix various crashes
• Fix various memory leaks

sharpd

• Added ability to install & remove LSPs
• Added ability to spam log messages
• Improve support for modifying route labels

staticd

• Improved debugging capabilities

vrrpd

• Fix several crashes related to deleting in-use VRFs and interfaces

zebra

• Added ability to toggle use of kernel nexthop IDs
• Added ability to set hoplimit for IPv6 RA's
• Added ability to set retransmit timer for IPv6 RA's
• Added support for IPv6 blackhole routes on *BSD
• Nexthop weight is now displayed in JSON output when showing nexthops
• Backup nexthops are now shown when displaying routes
• Hardened ZAPI interface against corrupt messages
• Router Advertisements now contain all IPv6 global interfaces on the egress interface, per RFC 4861
• Force reinstallation of EVPN-VXLAN flooding MAC if it is deleted from the kernel
• Fix missing weight value when installing V4 routes with V6 nexthops
• Fix various obscure memory leaks
• Fix learned kernel routes with admin distance of 255 not being marked as installed
• Fix IRDP checksum calculation
• Fix memory leak related to IPv6 RA's on shutdown
• Fix FPM sequencing issue when sending RMAC
• Fix intermittent 30 second delay when configuring LDP psuedowires

Miscellaneous

• vtysh can now load config files via a new CLI command
• Certain syslog messages related to daemon startup were incorrectly indicated as errors; they are now marked as information

Internal improvements

• Reloading performance improved
• Route-maps converted to use Northbound API
• Zebra gained Northbound support for some operational data
• Zebra had some commands converted to Northbound API
• Support for GCC 10

Packaging

Packaging work for this release is ongoing.