Apart from datastructure, bsm scope initialization and deinitialiation
routines called during pim instance init and deinit. Also makefile changes.
Signed-off-by: Saravanan K <saravanank@vmware.com>
It doesn't make much sense for a hash function to modify its argument,
so const the hash input.
BGP does it in a couple places, those cast away the const. Not great but
not any worse than it was.
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
bfd cbit is a value carried out in bfd messages, that permit to keep or
not, the independence between control plane and dataplane. In other
words, while most of the cases plan to flush entries, when bfd goes
down, there are some cases where that bfd event should be ignored. this
is the case with non stop forwarding mechanisms where entries may be
kept. this is the case for BGP, when graceful restart capability is
used. If BFD event down happens, and bgp is in graceful restart mode, it
is wished to ignore the BFD event while waiting for the remote router to
restart.
The changes take into account the following:
- add a config flag across zebra layer so that daemon can set or not the
cbit capability.
- ability for daemons to read the remote bfd capability associated to a bfd
notification.
- in bfdd, according to the value, the cbit value is set
- in bfdd, the received value is retrived and stored in the bfd session
context.
- by default, the local cbit announced to remote is set to 1 while
preservation of the local path is not set.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
The route_map_event_hook callback was passing the `route_map_event_t`
to each individual interested party. No-one is ever using this data
so let's cut to the chase a bit and remove the pass through of data.
This is considered ok in that the routemap.c code came this way
originally and after 15+ years no-one is using this functionality.
Nor do I see any `easy` way to do anything useful with this data.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
become stale entries.
Topology:
--------
Source
|
FHR
|
RP ------ LHR --- Recv1
|
Recv2
Root case :
-----------
When RP acts as a LHR i.e RP has a local receiver and registed for
the same group where LHR connected receiver also registered for the
same multicast group.When RP receives a (s,g) join form LHR , it
increments upstream ref count to two to track the Local membership
as well.But at the time of KAT expiry in RP , upstream reference
is not being removed Which is added to track local membership which
is causing to make these entries as stale in RP and FHR.
Fix : Made the change such that it removes the upstream reference
if it is added to track the local memberships.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
vrf_id parameter is added to the api of bfd_client_sendmsg().
this permits being registered to bfd from a separate vrf.
Signed-off-by: Philippe Guibert <philippe.guibert@6wind.com>
This macro:
- Marks ZAPI callbacks for readability
- Standardizes argument names
- Makes it simple to add ZAPI arguments in the future
- Ensures proper types
- Looks better
- Shortens function declarations
Signed-off-by: Quentin Young <qlyoung@cumulusnetworks.com>
There exists a possiblity that we have upstream data but
at this point in time the rpf failed because there is no
path. As such the rpf interface will be NULL and we
should not necessarily trust it. Prevent a crash
Ticket: CM-24857
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
So when we remove a ifchannel from the system we should check to
see if we still care about the S,G having it in the OIL still
due to inheritance rules. The deletion does not necessarily
mean it should not be in the OIL for the S,G.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
the json code has not been updated since a variety of new flags have
been added to the code base. Add those flags in so we can tell
what is going on sometimes.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Add the ability to select on a S or G for a `show ip mroute`
command.
show ip mroute 225.1.1.111
show ip mroute 4.5.6.7 225.1.1.111
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Always when creating a new S,G state look at all possible ifchannels
to decide what the mroute should be.
The bug that this is fixing is this:
Suppose two incoming `*,G` joins on swp1, and swp2.
Now suppose that one of those ifchannel `*,G` sends a `*,G S,G RPT Prune`.
We were creating the S,G upstream state as we should but we were
only looking at the S,G ifchannel to decide the S,G mroute we would
be creating. As such what we need to do is to look over the associated
*,G ifchannels and allow us to associate correct oil needed.
Ticket: CM-24732
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
1. vxlan instance cleanup needs to be done before the upstream entries are
force-flushed.
2. also vxlan callbacks need to be ignored post instance-cleanup.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
This was resulting in static analyzer warnings for subsequent usage
of the same pointer -
pimd/pim_vxlan.c:962:36: warning: Access to field 'info' results in a
dereference of a null pointer (loaded from variable 'ifp')
pim_ifp = (struct pim_interface *)ifp->info;
^~~~~~~~~
1 warning generated.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
The MLAG component on the switch is expected to provide some
properties (such as peerlink-rif) to bootstrap the anycast-VTEP
functionality. The final interface for this is being defined as
a part of the pim-mlag functionality.
This commit provides a hidden command to test the anycast-VTEP
functionality independent of the MLAG component.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Sample output:
root@TORS1:~# vtysh -c "show ip pim vxlan-groups"
Codes: I -> installed
Source Group Input Output Flags
27.0.0.7 239.1.1.101 lo I
* 239.1.1.100 - ipmr-lo I
* 239.1.1.101 - ipmr-lo I
27.0.0.7 239.1.1.100 lo I
root@TORS1:~#
root@TORS1:~# vtysh -c "show ip pim vxlan-work"
Codes: I -> installed
Source Group Input Flags
27.0.0.7 239.1.1.100 lo I
PS: note the worklist dump is a hidden command
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
The unique physical IP is used as the SIP in the ip header to ensure
that pim-register-stop makes it back to the right MLAG switch.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
1. peerlink-rif as OIF in origination mroutes -
Hosts are multi-homed to the anycast-VTEP pair and can send BUM traffic to
either switch. But the RP would have only joined one MLAG switch for
pulling down the MDT. To make that work we add the peerlink/ISL as
an OIF to origination mroutes (TORC11<=>TORC12 is an anycast VTEP pair) -
root@TORC11:~# ip mr |grep "(36.0.0.9, 239.1.1.100)"
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094 Oifs: peerlink-3.4094 uplink-1
root@TORC11:~#
root@TORC12:~# ip mr |grep "(36.0.0.9, 239.1.1.100)"
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094 Oifs: peerlink-3.4094
root@TORC12:~#
2. VTEP-PIP as register source -
TORC11 and TORC12 share the same anycast VTEP IP (36.0.0.9 in the above
example). And that is the source registered by both VTEPs for all the BUM
mcast-groups. However to allow the pim register start machine to close
the SIP in the register-pkt's IP header must be set to an unique IP address.
This is the VTEP PIP.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
1. special handling of term device in orig mroutes -
The multicast-vxlan termination device ipmr-lo is added to the (*, G)
mroute -
(0.0.0.0, 239.1.1.100) Iif: uplink-1 Oifs: uplink-1 ipmr-lo
This means that it will be inherited into all the SG entries including the
origination mroute. However we cannot terminate the traffic we originate
so some special handling is needed to exclude the termination device
in the origination entries -
27.0.0.7, 239.1.1.100) Iif: lo Oifs: uplink-1
2. special handling of term device on the MLAG pair -
Both MLAG switches pull down BUM-MDT traffic but only one (the DF) can
terminate the traffic. The non-DF must not exclude the termination device
from the MFC to prevent dups to the overlay.
DF -
root@TORC11:~# ip mr |grep "(0.0.0.0, 239.1.1.100)"
(0.0.0.0, 239.1.1.100) Iif: uplink-1 Oifs: uplink-1 ipmr-lo State: resolved
root@TORC11:~#
non-DF -
root@TORC12:~# ip mr |grep "(0.0.0.0, 239.1.1.100)"
(0.0.0.0, 239.1.1.100) Iif: uplink-1 Oifs: uplink-1 State: resolved
root@TORC12:~#
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
An interface needs to be designated as "termination device" and added to
the termination mroute's OIL. This is used by kernel and ASIC backends
to vxlan-decaps matching flows.
The default termination device is expected to have the prefix (start
sub-string) "ipmr-lo". This can be made configurable if needed -
root@TORS1:~# ip -d link show ipmr-lo
28: ipmr-lo: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
link/ether 12:5a:ae:74:51:a2 brd ff:ff:ff:ff:ff:ff promiscuity 0
dummy addrgenmode eui64
root@TORS1:~# ip mr
This commit includes the changes to enable pim implicitly on the device
and set it up as the vxlan-term device per-pim-instance.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
For vxlan origination mroutes the IIF is pinned to
a. lo for single VTEPs
b. peerlink-rif for anycast VTEPs
This commit includes the changes to react to pim-vifi add/del for these
devices.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
To terminate a multicast VxLAN tunnel entry we setup a mroute with
ipmr-lo in the OIL -
(0.0.0.0, 239.1.1.100) Iif: uplink-1 Oifs: uplink-1 ipmr-lo
This is done by the vxlan component that add ipmr-lo as a local
member to termination SG entries. In addition termination entries
are also subject to MLAG DF election on the anycast VxLAN-AA setup.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Two flags have been introduced per-upstream entry -
1. XXX_MLAG_VXLAN - This indicates that MLAG DF (designated-forwarded)
election is needed on the entry. In the case of pim-evpn this flag is set
for termination (*, G) entries and will be inherited by the (S, G) entries
that are created as a result of SPT switchover on the G.
2. XXX_MLAG_NON_DF - This is set on entries that have lost the
DF election. Such entries are primarily used for blackholing traffic on
one of the MLAG switches. On a hardware accelerated switch this blackholing
happens in the ASIC preventing (non-needed) traffic hitting the CPU.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
For multicast vxlan tunnels we register the local VTEP-IP independent
of the prescence of BUM traffic i.e. we prime the pump. This
is acheived via NULL registers.
VxLAN orig entries with upstream in a PIM_REG_JOIN state are linked to
a work list for periodic NULL register transmission. Once the SPT setup
is complete the upstream-entry moves to a PIM_REG_PRUNE state and is
remved from the VxLAN work list.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In a PIM MLAG setup (say L11<->L12 is the anycast VTEP pair) the RP
can choose to join either MLAG switch as the anycast VTEP-IP is
present on both. Let's say the RP joins L11.
Hosts are dual connected to L11<->L12 and can send traffic to either
switch. Let's say a host sends broadcast traffic to L12; now L12
must encapsulate and send the traffic toward L11. To do that the
origination-mroute on L12 must include the ISL in its OIL -
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094 Oifs: peerlink-3.4094
L11 has a similar mroute -
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094 Oifs: peerlink-3.4094 uplink-1
This mroute is used to rx traffic on peerlink-3.4094 and send it out of
uplink-1. Note that this mroute also includes the peerlink-rif in its
OIL. Explicit removal of IIF from OIL is done by the kernel (and other
dataplanes) to prevent traffic looping.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
For every (local-vtep-ip, bum-mcast-grp) registered by evpn an origination
mroute is setup by pimd. The purpose of this mroute is to forward vxlan
encapsulated BUM -
Sample mroute (single VTEP):
(27.0.0.7, 239.1.1.100) Iif: lo Oifs: uplink-1
Sample mroute (anycast VTEP):
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094\
Oifs: peerlink-3.4094 uplink-1
This commit is part-1 of orignation mroute setup and includes setup
of upstream entries with vxlan properties.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
pim-vxlan work is maintained in a lists and processing staggered. One
such work is the generation of periodic null registers for the local
VTEP-IP.
This info is instance agnostic and maintained in a global cache.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
This information will come in from a MLAG component. Hidden commands
will also be provided for testing the interface independent of the
separate MLAG component.
PS: It is possible that this cache will be merged with the base
pim-mlag datastructures once they are available.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
pim vxlan component will create upstream entries and OIFs for
multicast VxLAN tunnel origination and termination in single-VTEP
and anycast-VTEP (MLAG) setups.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
pim_vxlan will use this for registering the local-VTEP-IP wth the RP
independent of the presence of BUM traffic.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
ipmr-lo is a dummy netdev with no additional addressing requirements -
root@TORS1:~# ip -d link show ipmr-lo
28: ipmr-lo: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN mode DEFAULT group default
link/ether 12:5a:ae:74:51:a2 brd ff:ff:ff:ff:ff:ff promiscuity 0
dummy addrgenmode eui64
root@TORS1:~#
This device is used by pim-vxlan to signify multicast-vxlan-tunnel
termination.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In an anycast VTEP setup the peerlink-rif (ISL) is added as a OIF to the
tunnel origination mroute. A new OIF protocol, VxLAN, has been added to
allow that functionalty.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Two devices have special significance to multicast VxLAN tunnels -
1. tunnel origination device -
This device is used as the source device to vxlan-encapsulate BUM traffic.
In the case of the default-vrf this is lo. And in the case of non-default
VRF this is vrf-net-device. This patchset is limited to default-VRF
underlay so all subsequent references of origination-dev are to lo. But it
is possible in the future to extend support to non-default VRFs.
Sample origination mroute on single-VTEP:
(27.0.0.7, 239.1.1.100) Iif: lo Oifs: uplink-1
In the case of MLAG we need to mroute traffic form the MLAG-peer so
we force the IIF to the ISL.
Sample origination mroute on MLAG-VTEP:
(36.0.0.9, 239.1.1.100) Iif: peerlink-3.4094 Oifs: peerlink-3.4094 uplink-1
2. tunnel termination device -
This device is used in the OIL to indicate that packets matching the flow
must be vxlan terminated and overlay packets subsequently forward to the
tenants. A special device has been created for this purpose called ipmr-lo.
This is a simple dummy interface from the kernel perspective which has
special siginficance only to pimd which implicitly enabled pim on the
device and adds it to the termination mroutes.
Sample termination mroute:
(0.0.0.0, 239.1.1.100) Iif: uplink-1 Oifs: uplink-1 ipmr-lo
PS: currently we default the termination device name to "ipmr-lo" but in
the future it is possible to provide a config command to set the
termination device.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
PIM VxLAN handling will create two types of upstream entries and
maintain app-specific properties against the entry.
This commit provides the header definitions for that.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In a VxLAN-AA setup both the anycast VTEPS can send VxLAN encapsulated
traffic. This is despite the fact that the it is not-DR on the IIF
associated with the originating mroute.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In a MLAG setup both of the VTEPs can rx and reg-encapsulate BUM traffic
toward the RP. To prevent these duplicates we need a mechanism to disable
register encaps on specific mroutes.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
This is specifically needed to allow pim-evpn mroutes in the MLAG setup -
(36.0.0.11, 239.1.1.100) Iif: peerlink.4094 Oifs: uplink-1, peerlink.4094
I could have gone the other way and disabled PIM_ENFORCE_LOOPFREE_MFC but
that opens the door too wide. Relaxing the checks for mlag-specific mroutes
seemed like the safer choice.
This commit provides the infrastructure to relax checks on a per-mroute
basis.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In the case of vxlan origination entries IIF is set to -
1. lo for single VTEPs
2. MLAG-ISL for VTEPs multihomed via MLAG.
This commit creates the necessary infrastructure by -
1. allowing the IIF to be set statically (without RPF lookup)
2. and by preventing next-hop-tracking registration
PS: Note that I have skipped additional checks in pim_upstream_del
intentionally i.e. an attempt will be made to remove nexthop-tracking
for the upstream entry (with STATIC_IIF) which will fail because of the
up-entry not being in the nh's hash table. Ideally we should maintain
a nh pointer in the up-entry to prevent this unnecessary processing.
In the abscence of that I wanted to avoid spraying STATIC_IIF checks
all over.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
In the case of pim vxlan we create and keep upstream entries alive
in the abscence of traffic. So we need a mechanism to purge entries
abruptly on vxlan SG delete without having to wait for the entry
to age out.
These are again just the infrastructure changes needed for it.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
For vxlan BUM MDTs we prime the pump and register the local-VTEP-ip
as source even before the first BUM packet is rxed. This commit provides
the infrastructure changes needed for that.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
zebra sends (S, G) and (*, G) entries for BUM mcast groups to pimd. This
commit includes the changes to handle the notifications and trigger the
creation of (S, G) base cache in pimd.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
These entries will be used over the subsequent commits for
1. vxlan-tunnel-termination handling - setup MDT to rx VxLAN encapsulated
BUM traffic.
2. vxlan-tunnel-origination handling - register local-vtep-ip as a
multicast source.
Signed-off-by: Anuradha Karuppiah <anuradhak@cumulusnetworks.com>
Add a bit of code to allow us to look at specified S,G for
the upstream available to us.
If one item is listed we assume Group, if both we assume Source
then Group.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Add a bit of code to allow us to look at specified S,G for
the upstreams available to us.
If one item is listed we assume Group, if both we assume Source then
Group.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Replace cli 'debug static' with 'debug pim static', to make
the 'debug static' node available for staticd (eventually).
Signed-off-by: Mark Stapp <mjs@voltanet.io>
The decision for Update_SPTbit(S,G, iif) includes a test
for JoinDesired(S,G) in section 4.2.2. When we were deciding
to update the spt bit we were not taking this into account.
This commit fixes this issue.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When we receive a S,G join and the ifchannel is in S,G RPT Prune state,
pim should transition the ifchannel state to JOIN and transition the
pim_upstream state for the S,G stream.
Ticket: CM-24513
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
pim was sending a triggered response on every S,G RPT prune information
read. Suppose we had this in a *,G message:
*,G
S1, G RPT Prune
S2, G RPT Prune
We would send two triggered *,G messages upstream. This leads to over
processing and quickly changing state if S1 or S2 were in different
states.
Modify the code to send just one Triggered *,G upstream after looking
at all S,G state for a *,G.
Ticket: CM-24531
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
On the LHR after we decide that traffic is flowing and
we set the SPT bit for the S,G *and* the incoming IIF
of the S,G is different than the incoming IIF of the *,G
we should immediately send the *,G S,G RPT Prune as
a triggered response instead of waiting for the next
cycle.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Track whether or not we have received an answer from
our query to do nexthop tracking. This allows us to
go straight to doing a synchronous query for our
RPF.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Start the separation of tracking a Destination from the act
of looking it up. The cojoining of these two concepts led
to a bunch of code that had to think about both problems leading
to weird situations and code paths. Simplify the code by making
pim_ecmp_nexthop_search a static function and we only ever
call pim_ecmp_nexthop_lookup when we need to do a RPF().
pim_ecmp_nexthop_lookup will now attempt to find a stored pnc
and if it finds one it will report on the answer from it.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When creating new RP information from a `ip pim rp A.B.C.D/M A.B.C.D`
we should determine if we are the RP even if we can or cannot
determine if we have a path to the RP via RPF.
This is because we should determine if we are the RP based upon a
connected ip address match not whether or not we have a path to
the RPF. We would normally think this is not important but
RPF is inherently asynchronous and we can have a state where
we have registered for nht but have not received the actual
path back yet from zebra.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The current reverse logic led to this code construct
if (!pim_nexthop_lookup(...)) {
//Do something successfull
}
This is backwards and will cause logic errors when people
use this code. Fix to use true/false for success/failure.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When a new pim neighbor comes up, we need to go through and
mark nexthops that we have received from zebra for reachability
tracking so we can refigure stuff. If we pass in the new neighbor
we can limit the search to those nexthops out the interface that
the new neighbor has come up.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The pim_resolve_upstream_nh function call is no longer being used
let's remove it from the code base.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Issue: (*,G) mroute uptime is not updated in mroute table,
after deleting and adding the RP
Root cause: When RP gets deleted or becomes not reachable, then
we un-install the entry from the kernel, but still maintains the
entry in the stack. When RP gets re-configured or becomes reachable,
"show ip mroute" shows the uptime, when the channel_oil gets created.
Fix: Introduce a new time mroute_creation in the channel_oil, gets
updated when mroute gets installed in the kernel.
Signed-off-by: Sarita Patra <saritap@vmware.com>
When we delete an interface, we need to set the interface
ifindex to an internal value so that we don't end up in
a state where the re-addition of the same ifindex, due to
a rename operation, causes an infinite loop.
Fixes:#4007
Fix-Suggested-by: Saravanan K
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When we are displaying S,G string data we already auto
display the string as (S,G) no need to have ((S,G)).
Cleanup some that were found during log look through.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The pim_rp_check_is_my_ip_address function was checking to see
if we were the actual RP as well as the pim_register code
was doing the same thing. Remove the reduncancy a bit and
just make this function check for that we are the actual receiver
of this data.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The code as written will scan the entirety of all pim upstreams
on a rpf change, this is not necessary because we know that when
we get a nexthop change we already scan the upstreams reliant
on that and do this work. There is no need to do this again a
short time later.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
The interface column in pim was limited to 8 or 9 columns
all over the place in pim, fix the code up to allow interface
length to be up to 16 columns.
Ticket: CM-23083
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When we are shutting down, delay the zlookup free to as
late as possible since we may need it still
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
Suppose we have 2 routers A and B. Both Router A and B have
the same priority of 1000. Router A is the elected DR.
Now suppose B lowers his priority to 1. He still looses the
DR election and we are not sending a hello with the new priority.
Immediately after this A's priority is also lowered to 1, it
looses the election and sends the hello. B receives this hello
and elects A as the DR( since it has the better ip address)
At this point A believes B is the DR, and B believes A is the
DR until such time that the normal hello from B is sent to A,
which if timed correctly can be a significant amount of time).
This code just causes a hello to be sent if the priority is
changed. Now both sides will be able to converge quickly
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
When RP gets deleted, find all the (*, G) upstream whose group belongs to
the deleted RP, release the upstream from pnc->upstream_hash in the function
pim_delete_tracked_nexthop().
Signed-off-by: Sarita Patra <saritap@vmware.com>
When a RP gets deleted, find all the (*, G) upstream whose
group belongs to the deleted RP.
case 1: if the group belongs to any other rp, then call
pim_upstream_update() to update the upstream addr and rpf
information.
case 2: If no RP found for the group, then clear the pim
upstream address and rpf information.
Signed-off-by: Sarita Patra <saritap@vmware.com>
