The BIRD protocol SNMP makes it possible to retrieve management information
through SNMP. This is accomplished by implementing AgentX protocol. The BIRD
acts as an AgentX subagent, registers to master agent and provides management
information. Master agent handles SNMP communication and forwards request to
registered subagents. You will therefore need an additional component -- a SNMP
daemon capable of acting as AgentX master agent. In theory, the information
consumer don't have to support SNMP and could be very simple master agent for
logging/monitoring the BIRD state. For more detail see provided documentation.
This commit is squashed version of development history. Full development history
could be found on branch `proto-snmp'.
Some vendors do not fill the checksum for IPv6 UDP packets.
For interoperability with such implementations one can set
UDP_NO_CHECK6_RX socket option on Linux.
Thanks to Ville O for the suggestion.
Minor changes by committer.
Move bfd_opts grammar inside BFD parser code to avoid dependences between
nest and BFD grammars, which breaks when BFD build is disabled.
Add dummy bfd_opts grammar rule, so protocols can use this nonterminal
even with BFD disabled.
Thanks to Yuri Honegger for the bugreport.
In OSPFv3-IPv4 there is no requirement that link-local next hop announced
in Link-LSA must be in interface address range. Therefore, for interfaces
that do not have IPv4 address we can use some loopback IP address and
announce it as a next hop. Also we should accept such address.
BFD requires defined local IP, but for nexthop with onlink there might
not be such address. So we reject this combination of nexthop options.
This prevent crash where such combination of options is used.
Allow to explicitly configure the source IP address for RPKI-To-Router
sessions. Predictable source addresses are useful for minimizing the
holes to be poked in ACLs.
Changed from 'source address' to 'local address' by committer.
BGP route attributes have flags (Optional, Transitive) that are validated
on decode and set to valid value on export. But if such attribute is
modified by filter or set internally by BGP during import, then its flags
would be zero in local tables. That usually does not matter, as they are
not used locally and they were fixed on export, but invalid flags leaked
in BMP and MRT dumps.
Keep route attribute flags set to valid values even when set by filters
or modified by BGP.
Allow to define both nexthop and interface using iproute2-like syntax,
e.g.: route 10.0.0.0/16 via 10.1.0.1 dev "eth0";
Now we can avoid to use link-local scope hack (e.g. 10.1.0.1%eth0)
for cases where both nexthop and interface have to be defined.
Thanks to Marcin Saklak for the suggestion.
We can distinguish BGP sessions if at least one side uses a different IP
address. Extend olock mechanism to handle local IP as a part of key, with
optional wildcard, so BGP sessions could local IP in the olock and not
block themselves.
Increase max length of notification data in error logs from 16 to 128.
There is already enough space in the buffer.
Thanks to Marco d'Itri for the suggestion.
With very busy deployments, RPKI may kill cache connection too early.
Instead of that, we want it to keep loading if any data is waiting to
be read and the reason for delay is just our congestion.
Also, when we kill the session because of actually slow cache, we want
to reload from scratch as the data we have is unreliable and nobody
knows whether the state is still valid.
Implement BGP Send hold timer according to draft-ietf-idr-bgp-sendholdtimer.
The Send hold timer drops the session if the neighbor is sending keepalives,
but does not receive our messages, causing the TCP connection to stall.
Some BGP capabilities change the BGP behavior in a significant way, so if
the configuration depends on it, it is better to not establish BGP
session when the capability is not available.
Add several BGP option to require individual BGP capabilities during
session negotiation.
Old configs do not define MPLS domains and may use a static protocol
to define static MPLS routes.
When MPLS channel is the only channel of static protocol, handle it
as a main channel. Also, define implicit MPLS domain if needed and
none is defined.
When a MPLS channel is reloaded, it should reload all regular MPLS-aware
channels. This causes re-evaluation of routes in FEC map and possibly
reannouncement of MPLS routes.
Instead of just using route attributes, static routes with
static MPLS labels can be defined just by e.g.:
route 10.1.1.0/24 mpls 100 via 10.1.2.1 mpls 200;
The L3VPN protocol implements RFC 4364 BGP/MPLS VPNs using MPLS backbone.
It works similarly to pipe. It connects IP table (one per VRF) with (global)
VPN table. Routes passed from VPN table to IP table are stripped of RD and
filtered by import targets, routes passed in the other direction are extended
with RD, MPLS labels and export targets in extended communities. A separate
MPLS channel is used to announce MPLS routes for the labels.
When MPLS is active, received routes on MPLS-aware SAFIs (ipvX-mpls,
vpnX-mpls) are automatically labeled according to active label policy and
corresponding MPLS routes are automatically generated. Also routes sent
on MPLS-aware SAFIs announce local labels when it should be done.
When MPLS is active, static IP/VPN routes are automatically labeled
according to active label policy and corresponding MPLS routes are
automatically generated.
In general, private_id is sparse and protocols may want to map some
internal values directly into it. For example, L3VPN needs to
map VPN route discriminators to private_id.
OTOH, u32 is enough for global_id, as these identifiers are dense.
Add a new protocol offering route aggregation.
User can specify list of route attributes in the configuration file and
run route aggregation on the export side of the pipe protocol. Routes are
sorted and for every group of equivalent routes new route is created and
exported to the routing table. It is also possible to specify filter
which will run for every route before aggregation.
Furthermore, it will be possible to set attributes of new routes
according to attributes of the aggregated routes.
This is a work in progress.
Original work by Igor Putovny, subsequent cleanups and finalization by
Maria Matejka.
