OSPF Flapping & BFD loggiing

[anas.awad]

Hi Guys,

i need your advise for this issue

We have two Core nexus 7K running OSPF over the network & these two are connected to multiple N7Ks too, by OSPF point to point as below config

for this link in particular eth 10/3 & 10/6 i keep seeing logs from core 1 looks like osfp flapping but i cant detect the reason.

is this flapping issue?

Core-1

interface Ethernet10/3
description ***To-OPC-Distribution***
no ip redirects
ip address 10.100.16.5/30
ip ospf message-digest-key 1 md5 3 92ec6d95e3ef945c8b90db7a9976eee2
ip ospf network point-to-point
no ip ospf passive-interface
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
ip pim bfd-instance
no shutdown

Distribution-1

interface Ethernet10/6
description ***To-Core***
ip address 10.100.16.6/30
ip ospf message-digest-key 1 md5 3 92ec6d95e3ef945c8b90db7a9976eee2
ip ospf network point-to-point
no ip ospf passive-interface
ip router ospf 1 area 0.0.0.0
ip pim sparse-mode
ip pim bfd-instance
no shutdown

2017 Mar 23 12:06:04 sw001scctvdccr %BFD-5-SESSION_STATE_UP: BFD session 1124073555 to neighbor 10.100.16.6 on interface Eth10/3 is up.
2017 Mar 23 12:06:07 sw001scctvdccr %PIM-5-DR_CHANGE: pim [7282] DR change from 10.100.16.6 to 10.100.16.5 on interface Ethernet10/3
2017 Mar 23 12:06:07 sw001scctvdccr %BFD-5-SESSION_STATE_DOWN: BFD session 1124073555 to neighbor 10.100.16.6 on interface Eth10/3 has gone down. Reason: Echo Function Failed.
2017 Mar 23 12:06:07 sw001scctvdccr %OSPF-5-ADJCHANGE: ospf-1 [7264] Nbr 10.100.16.6 on Ethernet10/3 went EXSTART
2017 Mar 23 12:06:07 sw001scctvdccr %OSPF-5-ADJCHANGE: ospf-1 [7264] Nbr 10.100.16.6 on Ethernet10/3 went FULL
2017 Mar 23 12:06:10 sw001scctvdccr %PIM-5-DR_CHANGE: pim [7282] DR change from 10.100.16.5 to 10.100.16.6 on interface Ethernet10/3
2017 Mar 23 12:06:10 sw001scctvdccr %BFD-5-SESSION_STATE_UP: BFD session 1124073555 to neighbor 10.100.16.6 on interface Eth10/3 is up.
2017 Mar 23 12:13:37 sw001scctvdccr %OSPF-5-ADJCHANGE: ospf-1 [7264] Nbr 10.100.16.6 on Ethernet10/3 went DOWN
2017 Mar 23 12:13:37 sw001scctvdccr %PIM-5-DR_CHANGE: pim [7282] DR change from 10.100.16.6 to 10.100.16.5 on interface Ethernet10/3
2017 Mar 23 12:13:37 sw001scctvdccr %BFD-5-SESSION_STATE_DOWN: BFD session 1124073555 to neighbor 10.100.16.6 on interface Eth10/3 has gone down. Reason: Echo Function Failed.
2017 Mar 23 12:13:37 sw001scctvdccr %OSPF-4-NEIGH_ERR: ospf-1 [7264] (default) Neighbor 10.100.16.6 not found, packet dropped
2017 Mar 23 12:13:38 sw001scctvdccr %PIM-5-DR_CHANGE: pim [7282] DR change from 10.100.16.5 to 10.100.16.6 on interface Ethernet10/3
2017 Mar 23 12:13:38 sw001scctvdccr %BFD-5-SESSION_STATE_UP: BFD session 1124073555 to neighbor 10.100.16.6 on interface Eth10/3 is up.
2017 Mar 23 12:13:44 sw001scctvdccr %OSPF-5-ADJCHANGE: ospf-1 [7264] Nbr 10.100.16.6 on Ethernet10/3 went EXSTART
2017 Mar 23 12:13:44 sw001scctvdccr %OSPF-5-ADJCHANGE: ospf-1 [7264] Nbr 10.100.16.6 on Ethernet10/3 went FULL

[Reza Sharifi · Accepted solution]

Hi,

If BFD enabled on these devices? If yes, can you disable BFD feature (no feature bfd) and test again?

HTH

[anas.awad]

Hi Reza,

First, Thank you

Yes, bfd features is enabled on these switches, and if i try & disable it, will it affect the network ?

[Julio E. Moisa · Accepted solution]

Hi

No, It will not affect your network but is recommended to do that into a maintenance window. BFD is used to detect failures quickly.

BFD is a detection protocol that is designed to provide fast forwarding path failure detection times for all media types, encapsulations, topologies, and routing protocols. In addition to fast forwarding path failure detection, BFD provides a consistent failure detection method for network administrators. Because the network administrator can use BFD to detect forwarding path failures at a uniform rate, rather than the variable rates for different routing protocol hello mechanisms, network profiling and planning will be easier, and reconvergence time will be consistent and predictable.

:-)

[mukesh.kumar1000]

Hello 

I am getting following alarms

Jun 1 2017 00:55:47.495 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.8 on TenGigabitEthernet0/0/0.801 from LOADING to FULL, Loading Done
010284: Jun 1 2017 00:55:49.288 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.1 on TenGigabitEthernet0/0/0.800 from LOADING to FULL, Loading Done
010285: Jun 1 2017 00:55:50.022 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.9 on TenGigabitEthernet0/1/0.802 from FULL to DOWN, Neighbor Down: BFD node down
010286: Jun 1 2017 00:55:50.096 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.2 on TenGigabitEthernet0/1/0.800 from FULL to DOWN, Neighbor Down: BFD node down
010287: Jun 1 2017 00:55:50.104 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.9 on TenGigabitEthernet0/1/0.801 from FULL to DOWN, Neighbor Down: BFD node down
010288: Jun 1 2017 00:55:50.104 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.2 on TenGigabitEthernet2/0/2.800 from FULL to DOWN, Neighbor Down: BFD node down
010289: Jun 1 2017 00:55:50.199 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.1 on TenGigabitEthernet2/0/1.800 from LOADING to FULL, Loading Done
010290: Jun 1 2017 00:55:50.657 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.9 on TenGigabitEthernet0/1/0.801 from LOADING to FULL, Loading Done
010291: Jun 1 2017 00:55:53.727 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.9 on TenGigabitEthernet0/1/0.802 from LOADING to FULL, Loading Done
010292: Jun 1 2017 00:55:55.997 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.8 on TenGigabitEthernet0/0/0.802 from LOADING to FULL, Loading Done
010293: Jun 1 2017 00:55:56.877 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.2 on TenGigabitEthernet0/1/0.800 from LOADING to FULL, Loading Done
010294: Jun 1 2017 00:55:58.568 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.16.0.2 on TenGigabitEthernet2/0/2.800 from LOADING to FULL, Loading Done
010295: Jun 1 2017 01:07:35.320 CDT: %SEC-6-IPACCESSLOGS: list 13 denied 10.51.53.103 2 packets
010296: Jun 1 2017 01:38:35.320 CDT: %SEC-6-IPACCESSLOGS: list 13 denied 10.51.53.103 8 packets
010297: Jun 1 2017 02:01:55.574 CDT: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet1/0/0, link down due to remote fault
010298: Jun 1 2017 02:01:57.212 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.14 on TenGigabitEthernet1/0/0.802 from FULL to DOWN, Neighbor Down: BFD node down
010299: Jun 1 2017 02:01:57.313 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.13 on TenGigabitEthernet1/0/0.801 from FULL to DOWN, Neighbor Down: BFD node down
010300: Jun 1 2017 02:01:57.354 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.14 on TenGigabitEthernet1/0/0.802 from LOADING to FULL, Loading Done
010301: Jun 1 2017 02:01:57.426 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.125.0.9 on TenGigabitEthernet1/0/0.800 from FULL to DOWN, Neighbor Down: BFD node down
010302: Jun 1 2017 02:01:57.890 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.13 on TenGigabitEthernet1/0/0.801 from LOADING to FULL, Loading Done
010303: Jun 1 2017 02:01:58.179 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.125.0.9 on TenGigabitEthernet1/0/0.800 from LOADING to FULL, Loading Done
010304: Jun 1 2017 02:01:58.605 CDT: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet1/0/0, link down due to remote fault
010305: Jun 1 2017 02:02:00.284 CDT: %OSPF-5-ADJCHG: Process 1, Nbr 10.125.0.9 on TenGigabitEthernet1/0/0.800 from FULL to DOWN, Neighbor Down: BFD node down
010306: Jun 1 2017 02:02:00.443 CDT: %OSPF-5-ADJCHG: Process 8, Nbr 10.16.16.14 on TenGigabitEthernet1/0/0.802 from FULL to DOWN, Neighbor Down: BFD node down
010307: Jun 1 2017 02:02:00.624 CDT: %IOSXE_SPA-6-UPDOWN: Interface TenGigabitEthernet1/0/0, link down due to remote fault
010308: Jun 1 2017 02:02:01.604 CDT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/0/0, changed state to down
010309: Jun 1 2017 02:02:02.145 CDT: %OSPF-5-ADJCHG: Process 4, Nbr 10.16.8.13 on TenGigabitEthernet1/0/0.801 from FULL to DOWN, Neighbor Down: BFD node down
010310: Jun 1 2017 02:02:02.150 CDT: %OSPF-5-ADJCHG: Process 100, Nbr 172.19.21.26 on TenGigabitEther

sho bfd neighbors details

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.1.182 4306/1107317085 Up Up Te0/0/0.800
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.1.177
Handle: 12
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(1), Hello (hits): 2000(5498187)
Rx Count: 11500741, Rx Interval (ms) min/max/avg: 1/8210/848 last: 197 ms ago
Tx Count: 5498458, Tx Interval (ms) min/max/avg: 1/2008/1753 last: 280 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 18:35:00
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
--More--   My Discr.: 1107317085 - Your Discr.: 4306
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.1.190 4568/1107324499 Up Up Te0/1/0.800
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.1.185
Handle: 9
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(0), Hello (hits): 2000(376597)
Rx Count: 760925, Rx Interval (ms) min/max/avg: 1/1683/822 last: 200 ms ago
Tx Count: 376611, Tx Interval (ms) min/max/avg: 1/2005/1758 last: 1343 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 2d05h
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
--More--   Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107324499 - Your Discr.: 4568
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.3.10 4412/0 Down Down Gi1/1/5.800
Session Host: Software
OurAddr: 10.16.3.9
Handle: 3
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 5
Received MinRxInt: 0, Received Multiplier: 0
Holddown (hits): 0(0), Hello (hits): 1000(6346007)
Rx Count: 0, Rx Interval (ms) min/max/avg: 0/0/0 last: 4294967295 ms ago
Tx Count: 6346007, Tx Interval (ms) min/max/avg: 754/1010/877 last: 155 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: OSPF CEF
Last packet: Version: 1 - Diagnostic: 0
--More--   State bit: AdminDown - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 0 - Length: 0
My Discr.: 0 - Your Discr.: 0
Min tx interval: 0 - Min rx interval: 0
Min Echo interval: 0

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.3.46 4564/0 Down Down Te2/0/0.800
Session Host: Software
OurAddr: 10.16.3.41
Handle: 2
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 5
Received MinRxInt: 0, Received Multiplier: 0
Holddown (hits): 0(0), Hello (hits): 1000(752572)
Rx Count: 0, Rx Interval (ms) min/max/avg: 0/0/0 last: 4294967295 ms ago
Tx Count: 752572, Tx Interval (ms) min/max/avg: 754/1005/878 last: 568 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: OSPF CEF
--More--  Last packet: Version: 1 - Diagnostic: 0
State bit: AdminDown - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 0 - Length: 0
My Discr.: 0 - Your Discr.: 0
Min tx interval: 0 - Min rx interval: 0
Min Echo interval: 0

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.3.66 4565/1107317104 Up Up Te2/0/1.800
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.3.65
Handle: 6
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(0), Hello (hits): 2000(376684)
Rx Count: 758158, Rx Interval (ms) min/max/avg: 1/1942/848 last: 0 ms ago
Tx Count: 376710, Tx Interval (ms) min/max/avg: 1/2005/1758 last: 358 ms ago
--More--  Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 18:35:01
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107317104 - Your Discr.: 4565
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.3.74 4498/1107324501 Up Up Te2/0/2.800
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.3.73
Handle: 15
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
--More--  Holddown (hits): 0(1), Hello (hits): 2000(1939070)
Rx Count: 3900157, Rx Interval (ms) min/max/avg: 1/6720/822 last: 467 ms ago
Tx Count: 1939661, Tx Interval (ms) min/max/avg: 1/2007/1757 last: 1123 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 2d05h
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107324501 - Your Discr.: 4498
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.9.182 4128/1107317107 Up Up Te0/0/0.801
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.9.177
Handle: 5
--More--  Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(1), Hello (hits): 2000(30962360)
Rx Count: 64019066, Rx Interval (ms) min/max/avg: 1/645328/848 last: 585 ms ago
Tx Count: 30962966, Tx Interval (ms) min/max/avg: 1/2012/1756 last: 153 ms ago
Elapsed time watermarks: 2 2 (last: 2)
Registered protocols: CEF OSPF
Uptime: 18:34:58
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107317107 - Your Discr.: 4128
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.9.190 4566/1107324487 Up Up Te0/1/0.801
Session state is UP and using echo function with 250 ms interval.
--More--  Session Host: Software
OurAddr: 10.16.9.185
Handle: 7
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(0), Hello (hits): 2000(376620)
Rx Count: 760929, Rx Interval (ms) min/max/avg: 1/1683/822 last: 18 ms ago
Tx Count: 376634, Tx Interval (ms) min/max/avg: 1/2005/1756 last: 1011 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 2d05h
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107324487 - Your Discr.: 4566
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
--More--  10.16.17.182 4567/1107317109 Up Up Te0/0/0.802
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.17.177
Handle: 8
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(0), Hello (hits): 2000(376727)
Rx Count: 758136, Rx Interval (ms) min/max/avg: 1/4778/848 last: 132 ms ago
Tx Count: 376753, Tx Interval (ms) min/max/avg: 1/2005/1750 last: 213 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 18:34:57
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
My Discr.: 1107317109 - Your Discr.: 4567
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000
--More--  
IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.17.190 4560/1107324502 Up Up Te0/1/0.802
Session state is UP and using echo function with 250 ms interval.
Session Host: Software
OurAddr: 10.16.17.185
Handle: 4
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 3
Received MinRxInt: 2000000, Received Multiplier: 3
Holddown (hits): 0(0), Hello (hits): 2000(770996)
Rx Count: 1510680, Rx Interval (ms) min/max/avg: 1/7855/822 last: 437 ms ago
Tx Count: 771252, Tx Interval (ms) min/max/avg: 1/2005/1756 last: 766 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: CEF OSPF
Uptime: 2d05h
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 3 - Length: 24
--More--   My Discr.: 1107324502 - Your Discr.: 4560
Min tx interval: 250000 - Min rx interval: 2000000
Min Echo interval: 50000

IPv4 Sessions
NeighAddr LD/RD RH/RS State Int
10.16.19.46 4411/4100 Up Up Gi1/1/5.802
Session state is UP and using echo function with 400 ms interval.
Session Host: Software
OurAddr: 10.16.19.41
Handle: 1
Local Diag: 0, Demand mode: 0, Poll bit: 0
MinTxInt: 1000000, MinRxInt: 1000000, Multiplier: 5
Received MinRxInt: 1000000, Received Multiplier: 5
Holddown (hits): 0(0), Hello (hits): 1000(6345690)
Rx Count: 6350593, Rx Interval (ms) min/max/avg: 1/1036/876 last: 876 ms ago
Tx Count: 6345692, Tx Interval (ms) min/max/avg: 17/1012/879 last: 465 ms ago
Elapsed time watermarks: 0 0 (last: 0)
Registered protocols: OSPF CEF
Uptime: 9w1d
Last packet: Version: 1 - Diagnostic: 0
State bit: Up - Demand bit: 0
--More--   Poll bit: 0 - Final bit: 0
C bit: 0
Multiplier: 5 - Length: 24
My Discr.: 4100 - Your Discr.: 4411
Min tx interval: 1000000 - Min rx interval: 1000000

Can any body help me how to troubleshoot and solve the problem ?

[Masoud Pourshabanian]

Hello,

BFD negotiates some parameters such as timers with neighbors. Before disabling it completely, try to disable and enable it. It will renegotiate and set up new timers. You can also set the timer manually with "bfd interval" command. I also suggest you to check the cables between your devices. If no success, then disable it.

Masoud

[anas.awad]

Thank you Julio,

I'll try and disable the BFD in a maintenance time. My only concern is what BFD is detecting consider it as a failure? i hope this will help after disable BFD. honestly i tried troubleshooting for a long time with no success.

Thanks again

[Julio E. Moisa]

Hi

If no change has been implemented over this point to point, you could consider replace the SFP or cable, also monitor the CPU utilization on the distribution switch, assuming the Core has more uplinks without inconveniences. 

:-)

[djanka]

hi

have you had any try to disable it and re-enable it.

[itheodoridis]

can you please provide feedback on how you solved this? We are facing exact same issue.