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Allow to define static roa/flow routes without dest.
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Which, in contrast to SAFI 128, does not use MPLS labels.
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When recursive routes with hybrid next hops (e.g. IPv6 route with IPv4 next
hop) are allowed, we need both IPv4 and IPv6 IGP tables.
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Covers IPv4/VPNv4 routes with IPv6 next hop (RFC 5549), IPv6 routes with
IPv4 next hop (RFC 4798) and VPNv6 routes with IPv4 next hop (RFC 4659).
Unfortunately it also makes next hop hooks more messy.
Each BGP channel now could have two IGP tables, one for IPv4 next hops,
the other for IPv6 next hops.
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Basic support for SAFI 4 and 128 (MPLS labeled IP and VPN) for IPv4 and
IPv6. Should work for route reflector, but does not properly handle
originating routes with next hop self.
Based on patches from Jan Matejka.
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This may be useful if multple interfaces share the same network range.
Thanks to Fritz Grimpen for the original patch.
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When a BGP session with ADD_PATH is restarted and the neighbor do not
announce ADD_PATH capability during reconnect, the accept_ra_types is
still set to RA_ANY.
Thanks to Lennert Buytenhek for the bugreport
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The patch fixes several bugs introduced in previous changes, simplifies
the protocol by handing routes uniformly, introduces asynchronous route
processing to avoid issues with separate notifications for each next-hop
in ECMP routes, and makes reconfiguration faster by avoiding quadratic
complexity.
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Adds option 'allow bgp_local_pref' to override the usual restriction of
LOCAL_PREF on eBGP sessions.
Thanks to Lennert Buytenhek for the patch.
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During reconfiguration, old and new filter expressions in static routes
are compared using i_same() function. When filter expressions contain
function calls, it is necessary that old filter expressions are the
second argument in i_same(), as it is internally modified by i_same().
Otherwise pointers to old (and freed) data appear in the config
structure.
Thanks to Lennert Buytenhek for tracking and reporting the bug.
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Mostly capability signalling
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Dropped struct mpnh and mpnh_*()
Now struct nexthop exists, nexthop_*(), and also included struct nexthop
into struct rta.
Also converted RTD_DEVICE and RTD_ROUTER to RTD_UNICAST. If it is needed
to distinguish between these two cases, RTD_DEVICE is equivalent to
IPA_ZERO(a->nh.gw), RTD_ROUTER is then IPA_NONZERO(a->nh.gw).
From now on, we also explicitely want C99 compatible compiler. We assume
that this 20-year norm should be known almost everywhere.
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The variable nfa is not cleaned before each loop iteration and can have
a wrong value of nfa.nhs_reuse from the previous step.
Thanks to Bernardo Figueiredo for the bugreport and analysis.
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Stubnet nodes in OSPF FIB were removed during rt_sync(), but the pointer
remained in top_hash_entry.nf, so net-summary LSA origination was
confused, reported 'LSA ID collision' and net-summary LSAs were not
originated properly.
Thanks to Naveen Chowdary Yerramneni for bugreport and analysis.
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Integrated and extensible BGP with generalized AFI handling,
support for IPv4+IPv6 AFI and unicast+multicast SAFI.
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The RPKI protocol (RFC 6810) using the RTRLib
(http://rpki.realmv6.org/) that is integrated inside
the BIRD's code.
Implemeted transports are:
- unprotected transport over TCP
- secure transport over SSHv2
Example configuration of bird.conf:
...
roa4 table r4;
roa6 table r6;
protocol rpki {
debug all;
# Import both IPv4 and IPv6 ROAs
roa4 { table r4; };
roa6 { table r6; };
# Set cache server (validator) address,
# overwrite default port 323
remote "rpki-validator.realmv6.org" port 8282;
# Overwrite default time intervals
retry 10; # Default 600 seconds
refresh 60; # Default 3600 seconds
expire 600; # Default 7200 seconds
}
protocol rpki {
debug all;
# Import only IPv4 routes
roa4 { table r4; };
# Set cache server address to localhost,
# use default ports tcp => 323 or ssh => 22
remote 127.0.0.1;
# Use SSH transport instead of unprotected transport over TCP
ssh encryption {
bird private key "/home/birdgeek/.ssh/id_rsa";
remote public key "/home/birdgeek/.ssh/known_hosts";
user "birdgeek";
};
}
...
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Prefix and bucket tables are initialized when entering established state
but not explicitly freed when leaving it (that is handled by protocol
restart). With graceful restart, BGP may enter and leave established
state multiple times without hard protocol restart causing memory leak.
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