This commit fixes a rather obscure bug that was causing the GR
topotest to fail on a frequent basis.
RFC 3623 specifies that a router acting as a helper to a restarting
neighbor should monitor topology changes and abort the GR procedures
when one is detected, falling back to normal OSPF operation.
ospfd uses the ospf_lsa_different() function to detect when the
content of an LSA has changed, which is considered as a topology
change. The problem is that ospf_lsa_different() can return true
even when the two LSAs passed as parameters are identical, provided
one LSA has the OSPF_LSA_RECEIVED flag set and the other not.
In the context of the ospf_gr_topo1 test, router rt6 performs
a graceful restart and a few seconds later acts as a helper for
router rt7. When it's acting as a helper for rt7, it still didn't
translate its NSSA Type-7 LSAs, something that happens only after 7
seconds (OSPF_ABR_TASK_DELAY) of the first SPF run. The translated
Type-5 LSAs on its LSDB were learned from the helping neighbors
(rt3 and rt7). It's then possible that the NSSA Type-7 LSAs might
be translated while rt6 is acting as helper for rt7, which causes
the daemon to detect a non-existent topology change only because
the OSPF_LSA_RECEIVED flag is unset in the recently originated
Type-5 LSA.
Fix this problem by ignoring the OSPF_LSA_RECEIVED flag when
comparing LSAs for the purpose of topology change detection.
In short, the bug would only show up when the restarting router
would start acting as a helper immediately after coming back up
(which would be hard to happen in the real world). The topotest
failures became more frequent after commit 6255aad0bc because of
the removal of the 'sleep' calls, which used to give ospfd more time
to converge before start acting as a helper for other routers. The
problem still occurred from time to time though.
Fixes#9983.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Since f60a1188 we store a pointer to the VRF in the interface structure.
There's no need anymore to store a separate vrf_id field.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Description:
When changing the area from normal to NSSA, previous area's
ASBR router's type-5 also calculated and added to routing table along
with Type-7 lsas.
Made a change in route calculation such that it will not consider Type-5
lsas in calculation if it is originated from NSSA ASBR router.
These lsas will be age out at MAX age.
log:
frr(config-router)# do show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP,
O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP,
T - Table, v - VNC, V - VNC-Direct, A - Babel, F - PBR,
f - OpenFabric,
> - selected route, * - FIB route, q - queued, r - rejected, b - backup
t - trapped, o - offload failure
K>* 0.0.0.0/0 [0/0] via 10.112.157.253, ens160, 00:32:47
C>* 10.112.156.0/23 is directly connected, ens160, 00:32:47
S>* 22.22.22.2/32 [1/0] is directly connected, ens192, weight 1, 00:20:03
O>* 33.33.33.0/24 [110/20] via 100.1.1.220, ens192, weight 1, 00:08:55
via 100.1.1.220, ens192, weight 1, 00:08:55
O 100.1.1.0/24 [110/10] is directly connected, ens192, weight 1, 00:21:32
C>* 100.1.1.0/24 is directly connected, ens192, 00:23:11
frr(config-router)# do show ip ospf route
============ OSPF network routing table ============
N 100.1.1.0/24 [10] area: 0.0.0.1
directly attached to ens192
============ OSPF router routing table =============
R 2.2.2.2 [10] area: 0.0.0.1, ASBR
via 100.1.1.220, ens192
============ OSPF external routing table ===========
N E2 33.33.33.0/24 [10/20] tag: 0
via 100.1.1.220, ens192
via 100.1.1.220, ens192
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
We should always treat the VRF interface as a loopback. Currently, this
is not the case, because in some old pre-VRF code we use if_is_loopback
instead of if_is_loopback_or_vrf. To avoid any future problems, the
proposal is to rename if_is_loopback_or_vrf to if_is_loopback and use it
everywhere. if_is_loopback is renamed to if_is_loopback_exact in case
it's ever needed, but currently it's not used anywhere.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Function ospf_te_parse_te() and ospf_te_delete_te() browse TE TLV but also
subTLV. The loop that parse the subTLV check that cummulative read data doesn't
exceed the total size of the TLV. However, the sum variable that counts the
number of read data was wrongly intialize to 0 instead to 4 (i.e. the initial
TLV Header size that is located at the TOP of subTLV).
This patch adjust accordingly the initial value of the counter.
Signed-off-by: Olivier Dugeon <olivier.dugeon@orange.com>
The no-form should use the same arguments as the regular command, hence
replace "period" with "grace-period".
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Running ospf_topo_vrf1 leads us to this valgrind issue:
==2386518== Invalid read of size 8
==2386518== at 0x4971520: route_top (table.c:401)
==2386518== by 0x181F08: ospf_interface_bfd_apply (ospf_bfd.c:126)
==2386518== by 0x182069: ospf_interface_disable_bfd (ospf_bfd.c:158)
==2386518== by 0x18BF51: ospf_del_if_params (ospf_interface.c:557)
==2386518== by 0x18C584: ospf_if_delete_hook (ospf_interface.c:712)
==2386518== by 0x490CA0B: hook_call_if_del (if.c:61)
==2386518== by 0x490D1F3: if_delete_retain (if.c:286)
==2386518== by 0x490D337: if_delete (if.c:309)
==2386518== by 0x490CDED: if_destroy_via_zapi (if.c:200)
==2386518== by 0x49940A9: zclient_interface_delete (zclient.c:2237)
==2386518== by 0x4998062: zclient_read (zclient.c:3969)
==2386518== by 0x4979529: thread_call (thread.c:1908)
==2386518== by 0x4919918: frr_run (libfrr.c:1164)
==2386518== by 0x181AC7: main (ospf_main.c:235)
==2386518== Address 0x5df39a0 is 0 bytes inside a block of size 56 free'd
==2386518== at 0x48399AB: free (vg_replace_malloc.c:538)
==2386518== by 0x492A03E: qfree (memory.c:141)
==2386518== by 0x4970C6F: route_table_free (table.c:141)
==2386518== by 0x4970A36: route_table_finish (table.c:61)
==2386518== by 0x18C543: ospf_if_delete_hook (ospf_interface.c:708)
==2386518== by 0x490CA0B: hook_call_if_del (if.c:61)
==2386518== by 0x490D1F3: if_delete_retain (if.c:286)
==2386518== by 0x490D337: if_delete (if.c:309)
==2386518== by 0x490CDED: if_destroy_via_zapi (if.c:200)
==2386518== by 0x49940A9: zclient_interface_delete (zclient.c:2237)
==2386518== by 0x4998062: zclient_read (zclient.c:3969)
==2386518== by 0x4979529: thread_call (thread.c:1908)
==2386518== by 0x4919918: frr_run (libfrr.c:1164)
==2386518== by 0x181AC7: main (ospf_main.c:235)
==2386518== Block was alloc'd at
==2386518== at 0x483AB65: calloc (vg_replace_malloc.c:760)
==2386518== by 0x4929EFC: qcalloc (memory.c:116)
==2386518== by 0x49709F8: route_table_init_with_delegate (table.c:53)
==2386518== by 0x49717F4: route_table_init (table.c:528)
==2386518== by 0x18C328: ospf_if_new_hook (ospf_interface.c:659)
==2386518== by 0x490C97D: hook_call_if_add (if.c:60)
==2386518== by 0x490CE85: if_create_name (if.c:223)
==2386518== by 0x490DF32: if_get_by_name (if.c:622)
==2386518== by 0x4993F73: zclient_interface_add (zclient.c:2186)
==2386518== by 0x4998062: zclient_read (zclient.c:3969)
==2386518== by 0x4979529: thread_call (thread.c:1908)
==2386518== by 0x4919918: frr_run (libfrr.c:1164)
==2386518== by 0x181AC7: main (ospf_main.c:235)
==2386518==
Fix the ordering to do the individual node tree cleanup after we delete
the data we care about.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Currently, we automatically delete an inactive VRF when its last
interface is deleted. This code introduces a couple of crashes because
of the following problems:
- vrf_delete is called before calling if_del hook, so daemons may try to
dereference an ifp->vrf pointer which is freed
- in if_terminate, we continue to use the VRF in the loop condition
after the last interface is deleted
This check is needed only when the interface is deleted by the user,
because if the interface is deleted by the system, VRF must still exist
in the system. Move the check to appropriate places to fix crashes.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Issue #9983 explains what is wrong with the GR helper mode.
To unblock the CI that fails almost all the time on the ospf_gr_topo1
test, remove the commands and disable the test. Also add a reminder to
completely remove the helper mode if no one fixes the code in a month.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
Description:
timerval datastructure is being used without initialization.
Using these uninitialized parameters can lead unexpected results
so initializing before using it.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
Description:
In PointToPoint networks, There wont be DR and BDR.
But by default, All neighbours ism state is shown as
DR_OTHER.
Changed the nbr state format to <nbrsate>/- (ex : FULL/-)
to P2pnetworks.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
Description:
1. Adding uptime to the 'show ip ospf neighbor' o/p.
2. Adding uptime and deadtime in string format for json consumption.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
Do not return pointer to the newly created thread from various thread_add
functions. This should prevent developers from storing a thread pointer
into some variable without letting the lib know that the pointer is
stored. When the lib doesn't know that the pointer is stored, it doesn't
prevent rescheduling and it can lead to hard to find bugs. If someone
wants to store the pointer, they should pass a double pointer as the last
argument.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
When doing a normal exit from ospf we should close
the log file as that we are leaving a bunch of
unterminated logging processes by not doing so.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
This removes a giant `switch { }` block from lib/zclient.c and
harmonizes all zclient callback function types to be the same (some had
a subset of the args, some had a void return, now they all have
ZAPI_CALLBACK_ARGS and int return.)
Apart from getting rid of the giant switch, this is a minor security
benefit since the function pointers are now in a `const` array, so they
can't be overwritten by e.g. heap overflows for code execution anymore.
Signed-off-by: David Lamparter <equinox@opensourcerouting.org>
It allows FRR to read the interface config even when the necessary VRFs
are not yet created and interfaces are in "wrong" VRFs. Currently, such
config is rejected.
For VRF-lite backend, we don't care at all about the VRF of the inactive
interface. When the interface is created in the OS and becomes active,
we always use its actual VRF instead of the configured one. So there's
no need to reject the config.
For netns backend, we may have multiple interfaces with the same name in
different VRFs. So we care about the VRF of inactive interfaces. And we
must allow to preconfigure the interface in a VRF even before it is
moved to the corresponding netns. From now on, we allow to create
multiple configs for the same interface name in different VRFs and
the necessary config is applied once the OS interface is moved to the
corresponding netns.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
if_lookup_by_name_all_vrf doesn't work correctly with netns VRF backend
as the same index may be used in multiple netns simultaneously.
Use the appropriate VRF when looking for the interface.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
The `show ip ospf neighbor json` command was displaying
state:`Full\/DR`
Where state was both the role and whether or not the neigbhor
was converged. While from a OSPF perspective this is the state.
This state is a combination of two things.
This creates a problem in testing because we have no guarantee
that a particular ospf router will actually have a particular role
given how loaded our topotest systems are. So add a bit of json
output to display both the converged status as well as the
role this router is playing on this neighbor/interface.
The above becomes:
state:`Full\/DR`
converged:`Full`
role:`DR`
Tests can now be modified to look for `Full` and allow it to
continue. Most of the tests do not actually care if this
router is the DR or Backup.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Commit 3551ee9e90304 introduced a regression that causes GR to fail
under certain circumstances. In short, while ISM events should
be ignored while acting as a helper for a restarting router, the
DR/BDR fields of the neighbor structure should still be updated
while processing a Hello packet. If that isn't done, it can cause
the helper to elect the wrong DR while exiting from the helper mode,
leading to a situation where there are two DRs for the same network
segment (and a failed GR by consequence). Fix this.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Before starting the graceful restart procedures, ospf_gr_prepare()
verifies for each configured OSPF instance whether it has the opaque
capability enabled (a pre-requisite for GR). If not, a warning is
emitted and GR isn't performed on that instance.
This PR introduces an additional opaque capability check that will
return a CLI error when the opaque capability isn't enabled. The
idea is to make it easier for the user to identify when the GR
activation has failed, instead of requiring him or her to check
the logs for errors.
The original opaque capability check from ospf_gr_prepare() was
retaining as it's possible that that function might be called from
other contexts in the future.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
The ospfd opaque LSA infrastruture has an issue where it can't store
different versions of the same Type-9 LSA for different interfaces.
When flushing the self-originated Grace-LSAs upon exiting from the GR
mode, the code was looking up the single self-originated Grace-LSA
from the LSDB, setting its age to MaxAge and sending it out on all
interfaces.
The problem is that Grace-LSAs sent on broadcast interfaces have
their own unique "IP interface address" TLV that is used to identify
the restarting router. That way, just reusing the same Grace-LSA for
all interfaces doesn't work.
Fix this by generating a new Grace-LSA with its age manually set
to MaxAge whenever one needs to be flushed. This will allow the "IP
interface address" TLV to be set correctly and make GR work even in
the presence of multiple broadcast interfaces.
In the long term, the opaque LSA infrastructure should be updated
to support Type-9 link-local LSAs correctly so that we don't need to
resort to hacks like this.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
Add a 'json' parameter to the 'show_opaque_info' callback definition,
and update all instances of that callback to not display plain-text
data when the user requested JSON data.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
RFC 3623 says:
"If the restarting router determines that it was the Designated
Router on a given segment prior to the restart, it elects
itself as the Designated Router again. The restarting router
knows that it was the Designated Router if, while the
associated interface is in Waiting state, a Hello packet is
received from a neighbor listing the router as the Designated
Router".
Implement that logic when processing Hello messages to ensure DR
interfaces will preserve their DR status across a graceful restart.
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
FRR should only ever use the appropriate THREAD_ON/THREAD_OFF
semantics. This is espacially true for the functions we
end up calling the thread for.
Signed-off-by: Donatas Abraitis <donatas.abraitis@gmail.com>
Issue:
===================
OSPF neighbors are not going down even after 10 mins when
having a mismatch in hello and dead interval.
First neighbors are formed and then a mismatch in the interval
is created, it is observed that the neighbor is not going down.
Root Cause Analysis:
====================
The event HelloReceived defined in RFC 2328 was named as PacketReceived
and this event was scheduled whenever LS Update, LS Ack, LS Request,
DD description packet or Hello packet is received.
Although there is a mismatch in the Hello packet contents, the
event PacketReceived gets triggered due to LS Update received and the
dead timer gets reset and hence the neighbor was never going Down and
remains FULL.
Fix:
==================
As per RFC 2328, the HelloReceived needs to be triggered only when
valid OSPF Hello packet is received and not when other OSPF packets
are received. Modified the function name as well.
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Description:
As per the RFC 3623 section 3.2,
OSPF nbr shouldn't be deleted even in unsuccessful helper exit.
1. Made the changes to keep neighbour even after exit.
2. Restart the dead timer after expiry in helper. Otherwise, Restarter
will be in FULL state in helper forever until it receives the 'hello'.
Signed-off-by: Rajesh Girada <rgirada@vmware.com>
There's a helper function to check whether the interface is loopback or
VRF - if_is_loopback_or_vrf. Let's use it whenever we need to check that.
There's no functional change in this commit.
Signed-off-by: Igor Ryzhov <iryzhov@nfware.com>
The capability opaque command can trigger asserts through a rather
round-about mechanism. The command eventually calls
ospf_renegotiate_optional_capabilities, which will call
ospf_flush_self_originated_lsas_now, which has the side effect of
marking the OSPF instance as shutting down. This was causing the
flooding logic to call ospf_write immediately insted of waiting for the
select IO loop every time it was sending a maxage LSA. This could cause
the list of OSPF interfaces needing to send packets to be drained while
there was a call to ospf_write pending from the IO loop. When the
pending call ran, it would see the empty list of interfaces and assert.
Signed-off-by: Yuan Yuan <yyuanam@amazon.com>
The existing logic was not comparing the prefix of the extended
prefix TLV. As a result, the code was removing all of the prefix
SIDs except the one received on every LSA update.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
In update_ext_prefix_sid(), the sr_prefix is associated to the
SR node and inherits the adv router ID regardless.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
The code was not checking if in these label ranges [a,b], a is
smaller than b, which is assumed in several places, including when
determining the size of the block as b-a+1. As a consequence, the
results of a bad configuration can be unpredictable. Some effects
observed were: 1) segfault 2) de-activation of SR due to label
reservation failure.
The added validation function also checks if the SR blocks are
larger than some minimal size. RFC 8665 mandates that the blocks
be srictly larger than zero. In this patch, the minimum sized is
arbitrarily defined to be 16.
Checking if ranges would fall outside [16,1048575] is omitted
since the vty filtering takes care of that.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
The prior condition was wrong since it ended up allowing for
labels past the end of the SRLB. Variable 'current' should be in
range [0, size-1] for labels not to exceed the SRLB upper boundary.
In addition, emit a warning log when all labels in the SRLB have
been used.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Replaces several complex if conditions by a lookup to a utility
to determine if two ranges of numbers overlap.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Homogenize the code dealing with SRGBs and SRLBs by defining the
same set of utility functions for their reservation.
Unify also the logs and don't display function names since the
operations are only performed from the same functions.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Homogenize the code dealing with SRGBs and SRLBs by defining the
same set of utility functions for the deletion of SR blocks.
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
* Some of the debug flags were not shown in show debugging.
* The check for TI-LFA debug was made against the wrong variable.
* Some of the debugs were not cleared with 'no debug ospf'
Signed-off-by: Fredi Raspall <fredi@voltanet.io>
Considering that both the GR helper mode and restarting mode can be
enabled at the same time, the "graceful-restart helper-only" command
can be a bit misleading since it implies that only the helper mode
is enabled. Rename the command to "graceful-restart helper enable"
to clarify what the command does.
Start a deprecation cycle of one year before removing the original
command
Signed-off-by: Renato Westphal <renato@opensourcerouting.org>
min lsa packet sizes are not always directly corresponding
to the actual LSA. Add a bit of comments so it's easier
for future people to figure out.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
In some cases FRR is receiving a lsa data packet
with a length set to the length of the header only.
If we are expecting data from a peer in the form
of lsa data. Let's enforce it.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Several functions in ospf_vty.c were allocating json memory
irrelevant if it was needed or not and then at the end of the loop
free'ing it if it was not used. Clean up the access pattern.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
The usage of json_object_to_json_string_ext is meant for
generation of output string and returns a `char *` pointer
to the `formatted` output. Just calling it does nothing
and it's expensive to boot.
Modify the code in ospfd to just output with the NOSLASHESCAPE
when outputting.
Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Problem Statement :
===================
LSA with InitialSequenceNumber is not originated
after MaxSequenceNumber.
ANVL Test case 25.33 states:
============================
As soon as this flooding of a LSA with LS sequence number
MaxSequenceNumber has been acknowledged by all adjacent neighbors,
a new instance can be originated with sequence number of InitialSequenceNumber.
RCA :
=====
DUT did not originated LSA with INITIAL_SEQUENCE number even
after receiving ACK for max sequence LSA.
Code is not present to handle this situation in the lsa ack flow.
Fix :
=====
Add code to originate LSA with initial sequence number in the
LSA ack flow in case of wrap around sequence number.
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
ANVL Test case 28.11
If the database copy has LS age equal to MaxAge and LS sequence number
equal to MaxSequenceNumber, simply discard the received LSA
without acknowledging it.
ANVL Test Case 25.22
When an attempt is made to increment the sequence number past the maximum
value of N - 1 (0x7fffffff; also referred to as MaxSequenceNumber),
the current instance of the LSA must first be flushed from the routing domain.
ANVL Test Case 25.23
As soon as this flooding of a LSA with LS sequence number MaxSequenceNumber
has been acknowledged by all adjacent neighbors, a new instance can be
originated with sequence number of InitialSequenceNumber.
RCA:
When IXIA sent LS Seq num as MAX and LS Age as (MAX - 3),
DUT dropped the packet instead of sending ACK.
In function ospf_ls_upd, at Line 2106 the code is there to drop the LSA.
Hence its failing.
Fix:
LSAs ACK must be sent when received LSA is having max sequence number
but not max-aged.
Considering /* CVE-2017-3224 */ issue, have corrected the existing
code to prevent attacker from sending LSAs with max sequence number
and higher checksum and blocking the flooding of the Max-sequence numbered LSAs.
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Problem Statement:
===================
DUT selecting itself as DR when RR goes for reload.
Test Case 7.2
DUT (GR Helper) receives the Hello packet from the OSPF GR RESTARTER
(ANVL here) with DR and BDR set to 0.0.0.0 and DUT in its hello
neighbor list. DUT triggers the DR and BDR election although it is
in the Helper mode for that neighbor.
Root Cause Analysis:
====================
When hello packet is received with self router ID in the neighbor list,
there is no check in the code to handle this scenario. Hence the DR/BDR
election happens and it changes the DR although it is helper.
Fix:
===================
As per RFC 3623 Section 3. Operation of Helper Neighbor, below point,
we need to maintain the DR relationship.
Also, if X was the Designated Router on network segment S when the
helping relationship began, Y maintains X as the Designated Router
until the helping relationship is terminated.
Adding the check when DUT is under neighbor helper mode, we need to avoid
ISM state change when hello packet is received with DR/BDR set to 0.0.0.0.
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Problem Statement:
==================
Memory Leak seen at show_ip_ospf_neighbor_all_common (ospf_vty.c:4635)
RCA:
=================
In function show_ip_ospf_neighbor_all_common, one child json object is not
added to the parent child object when there is no nbma neighbor. Hence
the memory leak.
Fix:
=================
Add the child object to the parent json object.
Fixes: #9548
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Problem Statement:
==================
Summary LSA is not originated when router-id is modified or process is reset
Root Cause Analysis:
====================
When router-id is modified or process is cleared, all the external LSAs are
flushed then LSA is re-originated using ospf_external_lsa_rid_change
When the LSAs are flushed, the aggregate flags are not reset.
Fix:
===============
Reset the aggregation flag when the LSAs
are flushed.
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
Problem Statement:
==================
When hello-interval is configured as 5, automatically dead interval becomes
4 times of hello i.e 20 seconds. But user wants the dead interval as
40 seconds and hello as 5 seconds. Therefore user configures it.
Now "ip ospf dead-interval 40" is not shown in "show running-config"
Therefore when user restarts the daemon, the dead interval goes back to
20 seconds and the neighbors are down.
Fix:
==================
If user configures dead-interval as 40, show it in show running config.
Fixes: #9401
Signed-off-by: Mobashshera Rasool <mrasool@vmware.com>
