vivek [Mon, 2 May 2016 20:53:38 +0000 (13:53 -0700)]
BGP: Trigger IPv6 router advertisements upon config of unnumbered neighbor
Instead of turning on IPv6 RA on every interface as soon as it has an IPv6
address, only enable it upon configuration of BGP neighbor. When the BGP
neighbor is deleted, signal that RAs can be turned off.
To support this, introduce new message interaction between BGP and Zebra.
Also, take appropriate actions in BGP upon interface add/del since the
unnumbered neighbor could exist prior to interface creation etc.
Only unnumbered IPv6 neighbors require RA, the /30 or /31 based neighbors
don't. However, to keep the interaction simple and not have to deal with
too many dynamic conditions (e.g., address deletes or neighbor change to/from
'v6only'), RAs on the interface are triggered upon any unnumbered neighbor
configuration.
BGP-triggered RAs will cause RAs to be initiated on the interface; however,
if BGP asks that RAs be stopped (upon delete of unnumbered neighbor), RAs
will continue to be exchanged if the operator has explicitly enabled.
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-10640
Reviewed By: CCR-4589
Testing Done: Various manual and automated (refer to defect)
Donald Sharp [Thu, 28 Apr 2016 00:03:35 +0000 (20:03 -0400)]
debian: Debian fixups
This commit does two things:
1) Fixes package name to have ...+cl3u1
2) Allows the build to determine if we are building
a debian package on a init.d or systemd style system
and to do the right thing.
3) Fixed quagga service file naming
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Dave Olson <olson@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
The JSON outputs of a bunch of BGP commands were broken due to the
addition of VRF support. This fixes them all. Also replaces the use
of "-" in some of the JSON variable names with camel case names.
zebra: Implement recovery for route install failure
Quagga does not have proper recovery for route install failure (in
the kernel). The lack of this may not be a significant issue if the
failure is only an exception. However, the introduction of route
replace presents a new failure scenario which was not there earlier.
Before replace, the update operation involved a delete followed by
add; the failure of add would not leave hanging route entries in the
kernel as they would've got deleted first. With route replace, if
the replace fails, recovery action to delete the route is needed, else
the route remains hanging in the kernel.
In particular, with VRFs and in the presence of ECMP/multipath, a
failure mode exists where Quagga thinks that routes have been cleaned
up and deleted from the kernel but the kernel continues to retain them.
This happens when multiple VRF interfaces are moved from one VRF to
another.
This patch addresses this scenario by implementing proper recovery for
route install failure.
To allow for faster convergence, modify transmission of IPv6 RA so
that on link transitions(link up, change VRF, link add etc.), we
transmit RA fast to ensure faster convergence with BGP Unnumbered.
But we don't enable Fast RA if RA interval is in msecs as we've
fixed the fast RA interval to be 1s. We retransmit RA 4 times, once
each second on link events and when RA is first enabled.
Donald Sharp [Mon, 25 Apr 2016 15:34:35 +0000 (11:34 -0400)]
quagga: Fixup startup to allow consistency between sysV and systemd
We want the ability to start up quagga in a varied set of
environments. This needs to be done in SysV and systemd
startups. As such refactor the code to allow us to
allow end users to easily switch between the two
sysV:
edit the /etc/quagga/daemons file
service quagga [start|stop|reload|restart]
Systemd:
edit the /etc/quagga/daemons file
systemctl [start|stop|reload|restart] quagga
Ticket: CM-10634 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
Daniel Walton [Mon, 25 Apr 2016 20:19:08 +0000 (20:19 +0000)]
BGP peers remain in active while rdnbrd is running.
Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-7789, CM-8806
If the route-map for an "ip import-table" denied a route it only flagged
the nexthop as inactive, it did not actually delete the route. This
breaks all directly connected EBGP peers that peer via IPv4 because NHT
finds this /32 with an inactive nexthop.
Update last reset reason on interface down or neighbor addr loss.
Ticket:
Reviewed By:
Testing Done:
For interface-based peering, we don't update the reset reason to be
interface down. Similarly, we don't update the reason to be loss of
neighbor address (maybe due to RA loss). This patch addresses these
limitations.
Don Slice [Fri, 22 Apr 2016 00:12:26 +0000 (17:12 -0700)]
zebra: Change interface handling so non-vrf aware protocols correctly handle them
Changed interaction between zebra and routing protocols so that they correctly
fill in the vrf_iflist even for vrfs they're not responsible for. In that way,
when they get callbacks from zebra they can correctly understand whether they need
to create them or not.
Ticket: CM-10427 Signed-off-by: Don Slice
Reviewed-by:
Addition on hidden command "bfd multihop/singlehop" and "ptm-enable" per interface command
CM-10435
Issue: IBGP BFD sessions are created as multi-hop even though peer is single-hop away. This is causing an interop issue with ICOS.
Root Cause: By design all IBGP peers are registered with BFD as multi-hop.
Fix:
• Changed the default behavior of always treating IBGP BFD sessions as mult-hop. shared_network variable is used to determine whether the IBGP peer is single hop or multi-hop away. The logic for determining whether EBGP peer is single hop or multi-hop has not been changed.
• Since the default behavior has been changed, it will cause interop issues between 2.5 and 3.0 IBGP BFD sessions. A new hidden command “bfd multihop/singlehop” has been introduced to overcome the interop issues.
CM-10260
Issue: “Unable to connect to socket” message keeps getting logged when ptmd process doesn’t exist.
Root Cause: BFD clients (bgpd, ospfd and ospf6d) during initialization try to register with BFD/PTM by default. This results in continuous logging If PTM does not exist since there is no max on number of retries.
Fix:
• Stop the retries to connect to PTM after max reconnect timer of 5 mins is reached.
• Added zebra debug event wrapper to message logging to prevent it from showing by default.
CM-4541
Issue: Addition of a new command "ptm-enable" or "no ptm-enable" per interface to enable/disable PTM link status checks for an interface.
Fix: Currently there is only one ptm-enable global command that enables/disables PTM status updates for all interfaces. This new command will give the handle to individually stop interface from reacting on the PTM status updates.
• by default interface uses the ptm-enable global configuration
• "no ptm-enable" on an interface will disable PTM status updates from taking affect for that interface. This can bring the interface up if it was brought down due to PTM status update.
• "ptm-enable" on an interface will cause the interface to fallback to the global ptm-enable configuration value and will bring the interface up or down based on the last stored PTM status update if global ptm is enabled.
Ticket: CM-10435, CM-10260 and CM-4541 Signed-off-by: Radhika Mahankali Reviewed-by: Donald Sharp, Kanna Rajagopal
Don Slice [Thu, 21 Apr 2016 16:15:07 +0000 (16:15 +0000)]
zebra: Only create vrf route-node if in the kernel
Changed vrf_get to only create a route-node if the kernel has enabled the vrf,
supplying a table-id. If the quagga configuration contains vrfs that have not
yet been enabled by the kernel, the vrf is created with a vrf_id of VRF_UNKNOWN.
These vrfs are added to the vrf_list so they contain a zvrf and configuration,
but the route-node is not created until the kernel has signalled that the vrf
has been defined and enabled.
Ticket: CM-10481 Signed-off-by: Don Slice Reviewed-by: Donald Sharp
Donald Sharp [Thu, 21 Apr 2016 02:08:49 +0000 (22:08 -0400)]
bgp: Anti-Yammer Patch
When you shutdown interfaces with ifdown -a -X eth0
bgp would still attempt to talk to it's configured
neighbors but since the interface is down it would
just complain and complain. Now that we have
somewhat aggressive timers the error message
really starts to show up.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
Donald Sharp [Wed, 20 Apr 2016 20:12:29 +0000 (16:12 -0400)]
zebra: Fix zebra_rnh_register crash
Zebra is crashing inside of zserv_rnh_register when it attempts to
lookup a vrf that was just deleted:
Imagine this series of events:
Pre (A): ifdown -a -X eth0
(A) zebra notification from kernel that vrf is goneroo
(B) zebra notifies all daemons
(C) bgpd is churning because we have been removing interfaces and we
have an new path and it hasn't handled the vrf goneroo event yet from
zebra so it sends to zebra a new rnh with an old vrf_id.
(D) zebra attempts to lookup the zvrf and crashes because of pointer
dereference.
zebra handles all callbacks in one function. Convert that function to
check to see if we have a valid zvrf. If so make the callback
Ticket: CM-10482 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Change-Id: Iff33d70089d1393bf3e9c757d9e9faf134699121 Signed-off-by: kitty <khiruthigai.balasubramanian@hpe.com> Tested-by: NetDEF CI System <cisystem@netdef.org> Acked-by: Donald Sharp <sharpd@cumulusnetworks.com>
Donald Sharp [Fri, 15 Apr 2016 13:15:21 +0000 (09:15 -0400)]
vtysh: Allow file read in to continue in more cases
When a duplicate command is read in from a file,
there are cases where daemons return CMD_WARNING
this causes the command to not be send to subsuquent
daemons( if any ).
Allow the read in of commands to continue in this
situation.
Ticket: CM-10393 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Donald Sharp [Fri, 15 Apr 2016 17:09:58 +0000 (13:09 -0400)]
quagga: Check for existence of IFLA_INFO_SLAVE_KIND
IFLA_INFO_SLAVE_KIND is a new type of netlink message
If the kernel makes it available compile in support
else we'll just silently do the right thing.
Additionally reduce the test cases for netlink by 1 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: David Ahern <dsa@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Donald Sharp [Fri, 15 Apr 2016 01:46:44 +0000 (21:46 -0400)]
lib, bgpd: Refactor vrf handling through zclient
Protocols receive zclient vrf creation events from zebra.
This data was being handed to the protocol to decode and
then to hand back to zclient to create the vrf to then
handle appropriately. This is a bad idea.
Modify the code such that when zclient.c receives a vrf
event from zebra that it decodes the data and just creates
the vrf. Individual protocols just need to handle the
appropriate vrf events.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Donald Sharp [Wed, 13 Apr 2016 16:21:47 +0000 (12:21 -0400)]
zebra: Refactor struct zebra_t
We were including 'extern struct zebra_t zebrad;' all
over the place. This made no sense. Refactor
into zserv.h where the definition was and remove resulting
unnecessary code.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Donald Sharp [Wed, 13 Apr 2016 14:06:36 +0000 (10:06 -0400)]
lib, zebra: Rework vrf_add_update
The vrf_add_update function does not need to exist.
Move it's constituent parts into the appropriate
vrf_create/vrf_enable functionality as well as
move the zebra_vrf_add_update() function call
into zebra_vrf_enable()
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Daniel Walton [Thu, 14 Apr 2016 18:16:43 +0000 (18:16 +0000)]
quagga: "set community x:y" needs bounds checking
Signed-off-by: Daniel Walton <dwalton@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-10002
superm-redxp-05# conf t
superm-redxp-05(config)# route-map FOO permit 10
superm-redxp-05(config-route-map)# set community ?
AA:NN Community number in AA:NN format (where AA and NN are <0-65535>) or local-AS|no-advertise|no-export|internet or additive
none No community attribute
superm-redxp-05(config-route-map)# set community 2:2
superm-redxp-05(config-route-map)# set community 2:70000
% Malformed communities attribute
superm-redxp-05(config-route-map)# set community 70000:2
% Malformed communities attribute
superm-redxp-05(config-route-map)#
Key BGP 'show' commands have been expanded to support 'vrf all':
show ip bgp vrf all summary
show ip bgp vrf all neighbors
show ip bgp vrf all nexthop
show ip bgp vrf all update-group
show ip bgp vrf all
show bgp vrf all summary
show bgp vrf all update-group
show bgp vrf all
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Ticket: CM-10402
Reviewed By: CCR-4466
Testing Done: Manual
Donald Sharp [Wed, 13 Apr 2016 00:44:28 +0000 (20:44 -0400)]
debian: Add the creation of the quagga user to quaggavty group
The creation of the quagga user was not the only place
to add the quagga user to the quaggavty group. If
we are reinstalling quagga over a old version of
code then we need to check to see if the quagga
user is in the quaggavty and do the right thing.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Dave Olson <olson@cumulusnetworks.com>
Donald Sharp [Fri, 8 Apr 2016 19:32:53 +0000 (19:32 +0000)]
lib, zebra: Refactor vrf creation a bit more
Create the idea of a VRF_UNKNOWN, this is for a vrf where we don't
yet have the vrf_id for it yet.
Refactor the vrf_create code out of existence. We had two code
paths vrf_create and vrf_get. We should use vrf_get to create
the new vrf since XXX_get() creates the data structures now.
Signed-off-by: Donald Sharp Reviewed-by: Vivek Venkatraman <vivek@cumulusnetworks.com>
Donald Sharp [Fri, 8 Apr 2016 23:20:34 +0000 (19:20 -0400)]
lib: Fix priviledge modification for vty group specified
When attempting to switch runtime permissions over to
the correct group specified for the vty group, if the
user specified to run as does not have that vty group
then do warn about the issue and stop running
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reported-by: Thomas Martin <tmartincpp@gmail.com>
Timo Teräs [Fri, 22 May 2015 10:40:56 +0000 (13:40 +0300)]
privs: fix privilege dropping to use system defined groups
It may be requred for quagga process to belong to additional
groups. E.g. nhrp module will need to talk to strongSwan using
vici and may require additional permissions. Initialize groups
from the system group database.
Signed-off-by: Timo Teräs <timo.teras@iki.fi> Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Christian Franke [Wed, 13 May 2015 11:59:18 +0000 (13:59 +0200)]
lib/privs: Don't use CAP_NET_BROADCAST
From what I can tell, CAP_NET_BROADCAST has never been required for any
functionality in the Linux kernel, so we do not really need it.
However, it causes breakage in contexts where Quagga is started with a
limited set of capabilities, e.g. in Docker, because these may not
include CAP_NET_BROADCAST and in the case of Docker do not even support
adding CAP_NET_BROADCAST.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Brian Bennett [Tue, 17 Feb 2015 23:24:15 +0000 (23:24 +0000)]
lib: Fix POSIX capabilities on SunOS platforms
When using POSIX capabilities on SunOS the capabilities are too
restricitve resulting in quagga processes not being able to read their
own config files. Credit goes to Oracle where this patch was originally
authored and included in OpenSolaris.
lib/privs.c: Include additional capabilities, better checking of
missing capabilities.
Fixes: #820 Acked-by: Greg Troxel <gdt@ir.bbn.com> Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
Donald Sharp [Fri, 8 Apr 2016 13:16:14 +0000 (09:16 -0400)]
quagga: Remove iflist global variable
The file if.c has a iflist that had the list of interfaces
in the default vrf. Remove this variable and replace
with a vrf_iflist lookup on the default vrf where it
was used.
Additionally, modify ptm code to iterate over all vrf's
when enabling ptm.
Ticket: CM-10338 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Radhika Mahankali <radhika@cumulusnetworks.com>
Donald Sharp [Wed, 6 Apr 2016 19:51:09 +0000 (15:51 -0400)]
vtysh: Add file locking to Quagga.conf
Problem:
Systemd runs in parallel all quagga daemons after zebra is started up.
Now each command has a ExecStartPost which executes vtysh -b -n.
Each of these vtysh -b -n would blask configuration to each daemon.
This leads to the situation where vtysh process #2 is blasting
in config that is at a different spot in the Quagga.conf file
that vtysh process #1 is at.
If #1 has put itself into a different submode that #2 is at,
we will get failures and the code will not be read in properly.
This problem is especially evident for when you have more than one
protocol running at one time.
Solution:
flock Quagga.conf.
If you don't get the flock, sleep for a while, try to get flock again
go to slepp...
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: DAve Olson <olson@cumulusnetworks.com>
Donald Sharp [Wed, 6 Apr 2016 13:34:33 +0000 (09:34 -0400)]
lib, vtysh: Return actual problem further up
When we encounter a problem loading a config file
quantify to the end user what has gone wrong,
with a combination of err output as well as
return codes.
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com> Reviewed-by: Dave Olson <olson@cumulusnetworks.com>
Zebra: Fix VRF-id and table for BGP unnumbered (RFC 5549)
In the case of BGP unnumbered RFC 5549 (IPv4 routes with IPv6 nexthop), the
zebra code to handle routes was not initializing the correct VRF id and
locating the correct routing table, resulting in the routes not getting
installed. Fixed with this change.
Don Slice [Wed, 6 Apr 2016 12:08:42 +0000 (12:08 +0000)]
bgpd: Resolve ability to add route-map out to peer-group member
Modified the configuration code to properly allow a peer-group member
to have a route-map out applied when one does not exist on the peer-group
itself. This capability already existed for route-map in.
Ticket: CM-10058 Signed-off-by: Don Slice Reviewed-by: Donald Sharp
isisd: ignore unknown interfaces when adjusting IS-IS mtu
For example during startup of isisd, the MTU of interfaces is not
known, since this information will only be available once the
interfaces have been learned from zebra.
It makes no sense to include the MTU 0 that is stored for interfaces
in this state in the consideration whether a new lsp-mtu for an
area is valid, so skip interfaces which are in this state.
Signed-off-by: Christian Franke <nobody@nowhere.ws>
isisd: make sure that all interface addresses are advertised
If the following configuration commands are run interactively in
succession, the ipv6 addresses of this interface won't be advertised
in the router's LSP immediately:
# interface eth0
# ip router isis test
# ipv6 router isis test
This is because the ipv6 router command won't trigger a state change
for the interface and therefore, it won't trigger a regeneration of
the LSPs.
The same thing happens if IPv4 is enabled after IPv6, or for the cases
where IPv4 is disabled and IPv6 stays enabled or vice-versa.
Fix this by explicitly calling lsp_regenerate_schedule for the cases
where it won't be called implicitly.
Signed-off-by: Christian Franke <nobody@nowhere.ws>
isisd crashed on startup if it was enabled for an interface with
a too small MTU.
To fix this, we treat this case as an invalid configuration and
disable isis on that interface if that case happens, since it is
a configuration error.
Signed-off-by: Christian Franke <nobody@nowhere.ws>
isisd: work around route table asserts for deleting node with info
The route table code in lib/table.c triggers an assertion when a route
node with rn->info != NULL reaches refcount 0, probably to avoid
memleaks. In this particular case, this is not an issue, since the
info will be freed by the destructor.
However, since removing this assertion probably requires more
discussion, just make sure that rn->info gets freed and unset before
its refcount is decremented to zero.
Signed-off-by: Christian Franke <nobody@nowhere.ws>
In function vrf_get(), an early call to vrf_get_by_name() may end up
creating the Zebra VRF structure prior to the VRF id being set,
resulting in various other misbehavior. Fix this with appropriate
changes.
Donald Sharp [Mon, 4 Apr 2016 16:44:46 +0000 (12:44 -0400)]
bgpd: Another hash_get crash fix
Basically when modifying the peer->su, we must *always*
release the hash and then re-install it, else
we will cause crashes when we go to look up data
that is not going to be there.
Ticket: CM-10212 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
Donald Sharp [Mon, 4 Apr 2016 16:40:33 +0000 (12:40 -0400)]
lib: plist should not CMD_WARNING when command has already been entered
When you startup zebra and apply a prefix list command, and then at a
later point in time start up additional daemons and then attempt to
apply the integrated-config, the prefix-list command will stop
processing after zebra.
This is because when zebra attempted to process the command, it would
notice that it already had that cli handled and print a vty warning and
then it would return CMD_WARNING. This caused the loop over all the
commands to stop and as such the command would not be sent to all the
individual daemons.
This behavior is exactly the same as it is in the 2.5.X( hell it's
upstream behavior to! ). Modify the plist command to return CMD_SUCCESS
in this case.
Ticket: CM-10248 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com>
Donald Sharp [Fri, 1 Apr 2016 13:18:22 +0000 (09:18 -0400)]
vtysh: Make vtysh run as quagga user
vtysh should be run as the quagga user, else when
you execute a 'wr mem' the Quagga.conf and vtysh.conf
files are owned by whomever started the process.
This can cause file ownership issues.
Ticket: CM-10217 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Dave Olson <olson@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
Donald Sharp [Thu, 31 Mar 2016 20:31:52 +0000 (16:31 -0400)]
lib, zebra: Fix vrf new hook callback.
This commit fixes two issues:
1) The creation of a new vrf from the cli was not calling the vrf_create hook.
This is fixed.
2) The zebra_vrf_delete callback was deleting interface information that
belonged to vrf not zvrf. Remove the code as that it was not it's job
to do so.
Ticket: CM-10100 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Daniel Walton <dwalton@cumulusnetworks.com>
Quagga BGP needed a config 'bgp multiple-instance' in order to be able
to configure and use VRFs. Since this support is intrinsic to the
implementation, make this configuration on by default. Corresponding
change to 'show running-config' (and write) to display only if "no" is
configured.
This change will eliminate one unnecessary step in the configuration.
Signed-off-by: Vivek Venkatraman <vivek@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Donald Sharp <sharpd@cumulusnetworks.com>
Ticket: CM-10070
Reviewed By: CCR-4383
Testing Done: Manual
Donald Sharp [Thu, 31 Mar 2016 12:20:53 +0000 (08:20 -0400)]
zebra: Fix Startup with > 1k interfaces
Zebra in rt_netlink.c has a while (1) loop that handles
recvmsg from the netlink socket. In early bootup a
situation can occur whereby the netlink messages
take a long time to parse. This time starts to
take an exponential amount of time the more netlink
messages that you read in. There reaches
a point where the incoming netlink messages are
coming in at about the same rate that they are processed.
This ends up causing the while (1) loop to never exit.
Eventually this causes quagga to fail when the watchdog message
is never sent to systemd.
This patch attempts to address this deficiency in that
we allow for a pause from reading in netlink messages
to allow other work to be done. This pause drains
the work queue items created by the netlink received
data and allows zebra to respond to other system input.
I believe we will need to come back in and modify zebra
startup a bit more. There are ineffiencies that need
to be addressed as part of boot up.
Ticket: CM-9992 Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> Reviewed-by: Don Slice <dslice@cumulusnetworks.com> Reviewed-by: Wilson Kok <wkok@cumulusnetworks.com>
projects / matthieu / frr.git / log