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Nexus 7010, BFD problem

Geir Sand-Strand
Level 1
Level 1

‎02-18-2016 04:31 AM - edited ‎03-01-2019 08:12 AM

We have 2 N7K connected with each other on the Ethernet 1/1 interface.

N7K-eth1/1 <-> N7K-eth1/1

The problem is that bfd shows down.

N7K1# sh bfd neig interface eth1/1

OurAddr         NeighAddr       LD/RD                 RH/RS           Holdown(mu
lt)     State       Int                   Vrf                            
10.165.0.2      10.165.0.1      1140850702/0          Down            N/A(3)   
        Down        Eth1/1                default                        

N7K2# sh bfd neig interface eth1/1

OurAddr         NeighAddr       LD/RD                 RH/RS           Holdown(mu
lt)     State       Int                   Vrf                            
10.165.0.1      10.165.0.2      1107296257/0          Down            N/A(3)   
        Down        Eth1/1                default 

Both have run the same NXOS, same BFD config, same ospf config (just router-id differs) and same interface eth1/1 config (just ip that differs):

N7K1# sh run bfd

!Command: show running-config bfd
!Time: Thu Feb 18 13:21:18 2016

version 7.2(1)D1(1)
feature bfd

ip pim bfd

hsrp bfd all-interfaces

router ospf GLOBAL
  bfd
fabricpath domain default
  bfd

router ospf GLOBAL
  bfd
  router-id 1.1.1.1
  auto-cost reference-bandwidth 400 Gbps
  mpls ldp autoconfig area 0.0.0.0
  mpls ldp sync

interface Ethernet1/1
  cts manual
    no propagate-sgt
    sap pmk abba000000000000000000000000000000000000000000000000000000000000
  mtu 9216
  no ip redirects
  ip address 10.165.0.1/30
  no ipv6 redirects
  ip ospf network point-to-point
  ip router ospf GLOBAL area 0.0.0.0
  ip pim sparse-mode
  no shutdown

We have this between 2 others N7k without any problem.  BFD shows up.

Any idea what to look for in my problem described above?

Labels:
0 Helpful
5 Replies 5

chsarkar
Cisco Employee
Cisco Employee

‎02-18-2016 05:35 AM

Hello Gier,

Are the ports Eth1/1 physically up ? And which Linecard are you using in slot 1 ? 

Get the following cli output :

show module


Cheers !

0 Helpful

Geir Sand-Strand
Level 1
Level 1
In response to chsarkar

‎02-18-2016 05:55 AM

Yes all interfaces are up. Both N7K are identical, same sup and modules.

N7K1# sh int status

--------------------------------------------------------------------------------
Port             Name            Status    Vlan      Duplex  Speed   Type
--------------------------------------------------------------------------------
Eth1/1           --              connected routed    full    10G     10Gbase-SR
Eth1/2           --              connected routed    full    10G     10Gbase-SR
Eth2/1/1         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/1/2         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/1/3         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/1/4         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/2/1         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/2/2         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/2/3         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/2/4         --              connected f-path    full    10G     QSFP-40G-SR
Eth2/3           --              xcvrAbsen f-path    auto    auto    --        
Eth2/4           --              xcvrAbsen f-path    auto    auto    --        
Eth2/5           --              xcvrAbsen f-path    auto    auto    --        
Eth2/6           --              xcvrAbsen f-path    auto    auto    --        
Eth2/7           --              xcvrAbsen f-path    auto    auto    --        
Eth2/8           --              xcvrAbsen f-path    auto    auto    --        
Eth2/9           --              xcvrAbsen f-path    auto    auto    --        
Eth2/10          --              xcvrAbsen f-path    auto    auto    --        
Eth2/11          --              xcvrAbsen f-path    auto    auto    --        
Eth2/12          --              xcvrAbsen f-path    auto    auto    --        
Eth3/17          --              connected routed    full    a-10G   10Gbase-SR
Eth3/18          --              connected routed    full    a-10G   10Gbase-SR
Eth3/19          --              connected routed    full    a-10G   10Gbase-SR
Eth3/20          --              connected routed    full    a-10G   10Gbase-SR
Eth3/21          --              sfpAbsent routed    auto    auto    --        
Eth3/22          --              sfpAbsent routed    auto    auto    --        
Eth3/23          --              sfpAbsent routed    auto    auto    --        
Eth3/24          --              sfpAbsent routed    auto    auto    --        
Po11             --              connected routed    full    a-10G   --        
Lo0              --              connected routed    auto    auto    --        
Vlan1         --                 down      routed    auto    auto    --
Vlan615       --                 connected routed    auto    auto    --
Vlan697       Management         connected routed    auto    auto    --
Vlan1200      --                 connected routed    auto    auto    --

N7K1# sh module
Mod  Ports  Module-Type                         Model              Status
---  -----  ----------------------------------- ------------------ ----------
1    24     10 Gbps Ethernet Module             N7K-M224XP-23L     ok
2    12     10/40 Gbps Ethernet Module          N7K-F312FQ-25      ok
3    48     1/10 Gbps Ethernet Module           N7K-F348XP-25      ok
5    0      Supervisor Module-2                 N7K-SUP2E          active *
6    0      Supervisor Module-2                 N7K-SUP2E          ha-standby

Mod  Sw               Hw
---  ---------------  ------
1    7.2(1)D1(1)      2.3    
2    7.2(1)D1(1)      1.0    
3    7.2(1)D1(1)      0.2    
5    7.2(1)D1(1)      6.0    
6    7.2(1)D1(1)      6.0    

Mod  MAC-Address(es)                         Serial-Num
---  --------------------------------------  ----------
1    9c-57-ad-2b-b4-a0 to 9c-57-ad-2b-b4-bb  JAE193802CQ
2    54-4a-00-ac-09-d8 to 54-4a-00-ac-0a-13  JAE181002PX
3    74-a2-e6-7a-0b-40 to 74-a2-e6-7a-0b-7b  JAE185103DV
5    e4-c7-22-10-2f-4f to e4-c7-22-10-2f-61  JAF1748AFJR
6    e4-c7-22-0f-dd-13 to e4-c7-22-0f-dd-25  JAF1748AFKG

Mod  Online Diag Status
---  ------------------
1    Pass
2    Pass
3    Pass
5    Pass
6    Pass

Xbar Ports  Module-Type                         Model              Status
---  -----  ----------------------------------- ------------------ ----------
1    0      Fabric Module 2                     N7K-C7010-FAB-2    ok
2    0      Fabric Module 2                     N7K-C7010-FAB-2    ok
3    0      Fabric Module 2                     N7K-C7010-FAB-2    ok
4    0      Fabric Module 2                     N7K-C7010-FAB-2    ok
5    0      Fabric Module 2                     N7K-C7010-FAB-2    ok

Xbar Sw               Hw
---  ---------------  ------
1    NA               1.5    
2    NA               1.5    
3    NA               1.5    
4    NA               1.5    
5    NA               1.5    

Xbar MAC-Address(es)                         Serial-Num
---  --------------------------------------  ----------
1    NA                                      JAF1749AFAB
2    NA                                      JAF1749AMCA
3    NA                                      JAF1746BEFB
4    NA                                      JAF1749AFDF
5    NA                                      JAF1748AEQR

* this terminal session

0 Helpful

chsarkar
Cisco Employee
Cisco Employee
In response to Geir Sand-Strand

‎02-18-2016 07:28 AM

Thanks ! Pls get the following 2 cli outputs from working & non-working N7k boxes.

show feature | in enable

show running-config bfd all

show running-config interface eth1/1 all

Next, get the below cli output from non-working box -

show system internal bfd event-history errors

show bfd neighbors interface eth1/1 details

show system internal bfd sess-store

Next attach to module-1

attach module 1

 show system internal bfd sess-store

 show system internal bfd event-history errors

 

Cheers !

 

0 Helpful

Geir Sand-Strand
Level 1
Level 1
In response to chsarkar

‎02-18-2016 11:32 PM

Thanks for the reply.

Attached is the output of the commands.

Br

Geir

Preview file
30 KB
0 Helpful

Geir Sand-Strand
Level 1
Level 1
In response to Geir Sand-Strand

‎02-23-2016 06:39 AM

Well, it seems to be working now.

Since this N7K has 2 sup2, we did a switchover between the sup's and then it came up.

Switched back and still up.

Geir

0 Helpful
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