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FRR: T4020: Added CLI options for FRR daemons
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present for DHCP
VyOS 1.4 still leverages PPPd internals on the CLI.
pppd supports three options for a default route, none, auto, force.
* none: No default route is installed on interface up
* auto: Default route is only installed if there is yet no default route
* force: overwrite any default route
There are several drawbacks in this design for VyOS and the users. If auto is
specified, this only counted for static default routes - but what about dynamic
ones? Same for force, only a static default route got replaced but dynamic ones
did not got taken into account.
The CLI is changed and we now re-use already existing nodes from the DHCP
interface configuration:
* no-default-route:
On link up no default route is installed, same as the previous
default-route none
* default-route-distance:
We can now specify the distance of this route for the routing table on the
system. This defaults to 210 as we have for DHCP interfaces. All this will be
migrated using a CLI migration script.
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static routes
Issue is identical to the problem in T3680 (05aa22dcb4ce) which was for DHCP
based routes. Once a static route is added to the system, the PPPoE
auto-installed default route is lost.
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Add new bgp parameter 'no-suppress-duplicates'
set protocols bgp parameters no-suppress-duplicates
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According to a wrong bug [1] there is no longer a vrf suffix available for
interfaces. This got changed in [2] which no longer print vrf name for
interface config when using vrf-lite.
1: https://github.com/FRRouting/frr/issues/10805
2: https://github.com/FRRouting/frr/pull/10411
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Also add ipv6-next-hop peer-address
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Commit 05aa22dc ("protocols: static: T3680: do not delete DHCP received routes")
added a bug whenever a static route is modified - the DHCP interface will
always end up with metric 210 - if there was a default route over a DHCP
interface.
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Static table dhcp-interface route required table in template
Without table this route will be placed to table 'main' by default
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- Reverted changes from `python/vyos/util.py`. This may lead to
unnecessary FRR restart during each boot, depending on a default file
content and template, but makes this changeset cleaner.
- Fixed typos in node names (extra `>` characters).
- Added SNMP module for `isisd` and `ldpd`, since they have it compiled
now.
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The BGP conditional advertisement feature uses the non-exist-map or the
exist-map and the advertise-map keywords of the neighbor advertise-map command
in order to track routes by the route prefix.
non-exist-map
=============
* If a route prefix is not present in the output of non-exist-map command, then
advertise the route specified by the advertise-map command.
* If a route prefix is present in the output of non-exist-map command, then do
not advertise the route specified by the addvertise-map command.
exist-map
=========
* If a route prefix is present in the output of exist-map command, then
advertise the route specified by the advertise-map command.
* If a route prefix is not present in the output of exist-map command, then do
not advertise the route specified by the advertise-map command.
This feature is useful when some prefixes are advertised to one of its peers
only if the information from the other peer is not present (due to failure in
peering session or partial reachability etc).
The conditional BGP announcements are sent in addition to the normal
announcements that a BGP router sends to its peer.
CLI nodes can be found under:
* set protocols bgp neighbor <ip> address-family <afi> conditional-advertisement
* set protocols bgp peer-group <p> address-family <afi> conditional-advertisement
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This command is applicable at the global level and at an individual bgp level.
If applied at the global level all bgp instances will wait for fib installation
before announcing routes and there is no way to turn it off for a particular
BGP vrf.
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Administrative shutdown of all peers of a bgp instance. Drop all BGP peers,
but preserve their configurations. The peers are notified in accordance with
RFC 8203 by sending a NOTIFICATION message with error code Cease and subcode
Administrative Shutdown prior to terminating connections.
This global shutdown is independent of the neighbor shutdown, meaning that
individually shut down peers will not be affected by lifting it.
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This command enables rejection of incoming and outgoing routes having AS_SET
or AS_CONFED_SET type.
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This command allows user to prevent session establishment with BGP peers with
lower holdtime less than configured minimum holdtime.
When this command is not set, minimum holdtime does not work.
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Whenever BGP peer address becomes unreachable we must bring down the BGP
session immediately. Currently only single-hop EBGP sessions are brought down
immediately. IBGP and multi-hop EBGP sessions wait for hold-timer expiry to
bring down the sessions.
This new configuration option helps user to teardown BGP sessions immediately
whenever peer becomes unreachable.
This configuration is available at the bgp level. When enabled, configuration
is applied to all the neighbors configured in that bgp instance.
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Set the period to rerun the conditional advertisement scanner process.
The default is 60 seconds.
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Instead of analyzing options for each daemon now we use a single
template for the whole configuration file. This makes logic a bit less
flexible, but much easier.
Removed unnecessary check for returned by the
`conf.get_config_dict(base)` config.
Also, added the ability to disable `strip()` of file content while
using `read_file()` what is necessary for proper comparing with
updated content.
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