In case, the BGP or PBR daemon leaves, the PBR contexts created by this
daemon are flushed.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
Move the list_delete_and_null of the virt->vrfs code to
the actual deletion function to ensure proper lifecycle.
This assumption allows us to know that irt->vrfs is always
true so remove the NULL check on it.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The irt->vnis list was being freed on going down,
but actually delete it from the deletion function. Then
we can know that the irt->vnis is a valid list anywhere
we have a irt pointer.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
This option is only implemented by 4 daemons:
- BGPD
- RIPD
- RIPNGD
- Zebra
Manpages and documentation say that the option causes routes to not be
uninstalled from zebra when the daemon terminates. This is true for RIPD
and RIPNGD. This is not true for BGPD; in that daemon it only prevents
transmission of Cease / Peer Unconfig NOTIFICATION messages to peers.
Moreover, when any daemon disconnects from Zebra, all of its routes are
uninstalled from Zebra and the kernel regardless of this option,
rendering the option largely vestigial.
It is still useful in Zebra, where it prevents all routes from being
uninstalled when Zebra shuts down, so it is left there.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
Functionality to let vtysh attempt to reconnect to daemons when
connection is lost (e.g. crash or restart).
Signed-off-by: Mladen Sablic <mladen.sablic@gmail.com>
Inter Area Prefix LSA ECMP is not working properly.
Two ABRs advertising IAP routes to backbone, not installed
with correct cost or if ABR restarted the route is removed
from backbone.
The current implementation ABR was not suppressing IAP update
for prefix cost is not better or route is not installed.
The better cost or path route was overwritten with non optimal
cost. This caused a loop with nexthops pointing each other
at backbone and non-backbone routers.
Consider to only send BEST/installed route's IAP notification
at ABRs.
When receiving IAP update from multiple ABRs, preserve multiple
advertising routers under the prefix route node.
Upon LSA maxage only remove the advertising route's which is
impacted and update route's nexthops and update FIB.
Testing Done:
Top to Bottom is part of area 0 on the Right, and
from Left side in area 1.
Top and Bottom act as ABRs.
H1 route is sent as Inter-Area Prefix to Right.
Trigger multiple triggers for ABR routes.
1) Shutting down link between, top to right to eliminate nhs
2) Restart frr at Top.
3) Restart frr at Right.
+-----------+
. |
,'| Top |`.
/ . | \
,' ,'+.----------+`. `.
/ / ` `. \ ',
,' ,' ,' \ `. .
- / ` `. ', `,
,` ,` ,' \ \ \
' - ` `. `, `,
+--------+ +--`--`--`--+ +---'---'--'+ +--------+
| | | | | | | |
| H1 ------ Left | | Right ------ H2 |
| | | | | | | |
+--------+ +-----------+ +----.--,-,-+ +--------+
`. ` \ - / /
\ `. ` ,' .` `
' . \ / / '
`. \ `. ` / ,'
\ ` . ,` / /
`. `. . / / /
\ . \ ,' ' /
' '--'--------+,'.`
`.| - /
' mid1 |/
| -
+-----------+
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
This commit moves the command 'bgp enforce-first-as' from global BGP
instance configuration to peer/neighbor configuration, which can now be
changed by executing '[no] neighbor <neighbor> enforce-first-as'.
End users can now enforce sane first-AS checking on regular sessions
while e.g. disabling the checks on routeserver sessions, which usually
strip away their own AS number from the path.
To ensure backwards-compatibility, a migration routine was added which
automatically sets the 'enforce-first-as' flag on all configured
neighbors if the old global setting was activated. The old global
command immediately disappears after running the migration routine once.
Signed-off-by: Pascal Mathis <mail@pascalmathis.com>
There exists code paths where the rn was being used after free.
This eliminates these code paths.
Fixes: CM-21019
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The linux kernel is getting the same Route Replace semantics
for v6 that v4 uses. Allow the end-user to know if their
kernel has this ability and if so to specify it so zebra
can take advantage of this.
Why not do auto-detection? Because you would have to write
code in zebra to add a route then add the same route again
with different nexthops to see if which semantics it is using.
It sure is easier to just add a cli that allows the user to
do it.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Apparently Automake has some undocumented logic somewhere that makes it
so any Makefile generated from an Automake Makefile.am is removed from
its secret list of things to delete that it deletes when performing a
recursive distclean before actually performing the recursive distclean
and since the secret list is automatically generated from the list of
things that Autoconf should generate in configure.ac we can't remove the
Makefile from that list or it will break Automake's list of things to
automatically generate that it generates from Autoconf's list of things
to automatically generate.
Thus, to prevent Automake from deleting Makefiles and then immediately
trying to use the Makefiles it just deleted to delete said Makefiles, we
must remove ourselves from the secret list, which is accomplished by
changing the file extension to '.am' instead of '.in'.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
Setup the buf used for extra data passed into kernel such
that we are cleaning it out before writing data to it,
so we can avoid writing uninited data.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Use brouter table to fetch nexthops for
asbr prefix (external) routes.
Change adv. router of the router's path once
the DB/FIB is updated with effective nexthops.
Cleanup of nexthop update when route's adv
router changes cost.
Ticket:CM-16139
Testing Done:
Tested ASBR external routes in CLOS topology with
multiple paths asbr originator at tor to spine.
Validated external route's nexthop within
area and inter area.
Signed-off-by: Chirag Shah <chirag@cumulusnetworks.com>
Add the documentation for match source-instance.
I also noticed that 'match source-protocol' was missing
add that in too.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Add to zebra route-maps the ability to match on a source-instance
route-map FOO deny 55
match source-instance 5
route-map FOO permit 60
ip protocol any route-map FOO
This will match any protocol route installation with a source-instance of 5.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The neighbor host_list is expensive as well. Modify
the code to take advantage of a rb_tree as well.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
We are going to modify more host_list's to host_rb's
so let's rename some functions to take advantage of
what is there.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The host_list when we attempt to use it at scale, ends
up spending a non-trivial amount of time finding and
sorting entries for the host list. Convert to a rb tree.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Kernel 2.2 was released in 1999, I'm pretty sure everybody has it by
now. Plus these links don't even exist anymore.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
