%DUAL-5-NBRCHANGE: IP-EIGRP- K-value mismatch

[ittechk4u1]

Hello Experts,

I am getting the error...

%DUAL-5-NBRCHANGE: IP-EIGRP(0) : Neighbor xxx.xxx.xxx.xxx (GigabitEthernet1/0/2) is down: K-value mismatch

I checked theK values by using "sh ip protocols " command..

He is the output:

 R1:

EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0

R2:

 Metric weight K1=1, K2=0, K3=1, K4=0, K5=0

Both are same but still tunnel is going down/up.

Any idea..why tunnel is flapping...

Thanks

[Julio E. Moisa]

Hi

It is not normal, try to specify the MTU on both interfaces

interface g0/X
ip mtu 1500

https://supportforums.cisco.com/discussion/10307246/eigrp-k-value-mismatch-issue

[ittechk4u1]

Both interface is set with MTU 1500.

R1:

R1#   sh int gig1/0/1
GigabitEthernet... is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0016.c7da.b4c1 (bia 35......)
  Internet address is xxx.xxx.xxx.xxx/24
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

R2:

R2#sh int gig1/0/1
GigabitEthernet.. is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is 0013.19f0.c341 (bia 1613.....)
  Internet address is xxx.xxx.xxx.xxx/24
  MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,

Regards

[Jon Marshall]

Those are the physical interfaces but you mentioned a tunnel ?

Jon

[ittechk4u1]

Hi,

there is no tunnel...

Both side are physical interface connected with Radio Relay...

Design:

R1 (GIg1/0/1)........Radio realy..........R2(Gig1/0/1)

Error: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 24: Neighbor xxx.xxx.xxx.xxx (GigabitEthernet1/0/1) is down: K-value mismatch

Thanks

[Dmitri Popkov]

Please show output with sh ip protocols and configuration of eigrp instance on both sides.

Also is it possible to gather packet capture on one size?

[ittechk4u1]

Hi,

Here are the output of Sh IP protocol

R1#sh ip protocols
*** IP Routing is NSF aware ***

Routing Protocol is "eigrp 24"
  Outgoing update filter list for all interfaces is not set
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
  EIGRP maximum hopcount 100
  EIGRP maximum metric variance 1
  Redistributing: static, eigrp 24
  EIGRP NSF-aware route hold timer is 240s
  Automatic network summarization is not in effect
  Maximum path: 4
  Routing for Networks:
    10.250.24.0/24
    10.251.24.0/24
  Routing Information Sources:
    Gateway         Distance      Last Update
    10.251.24.1           90      08:58:54
    10.250.24.1           90      08:58:54
  Distance: internal 90 external 170

Config:

router eigrp 24
 redistribute static
 network 10.250.24.0 0.0.0.255
 network 10.251.24.0 0.0.0.255
 no auto-summary

-------------------------------------------------------------------------------------

R2#sh ip protocols
*** IP Routing is NSF aware ***

Routing Protocol is "eigrp 24"
  Outgoing update filter list for all interfaces is not set
    GigabitEthernet1/0/1 filtered by filter_eigrp_voice, default is filter_eigrp_voice
    GigabitEthernet1/0/2 filtered by filter_eigrp_data, default is filter_eigrp_data
  Incoming update filter list for all interfaces is not set
  Default networks flagged in outgoing updates
  Default networks accepted from incoming updates
  Redistributing: eigrp 24
  EIGRP-IPv4 Protocol for AS(24)
    Metric weight K1=1, K2=0, K3=1, K4=0, K5=0
    NSF-aware route hold timer is 240
    Router-ID: 10.251.24.1
    Stub, connected, summary
    Topology : 0 (base)
      Active Timer: 3 min
      Distance: internal 90 external 170
      Maximum path: 4
      Maximum hopcount 100
      Maximum metric variance 1

  Automatic Summarization: disabled
  Maximum path: 4
  Routing for Networks:
    10.250.24.0/24
    10.251.24.0/24
  Routing Information Sources:
    Gateway         Distance      Last Update
    10.250.24.254         90      08:59:19
    10.251.24.254         90      08:59:19
    .....skip
  Distance: internal 90 external 170

Config:

router eigrp 24
 distribute-list filter_eigrp_voice out GigabitEthernet1/0/1
 distribute-list filter_eigrp_data out GigabitEthernet1/0/2
 network 10.250.24.0 0.0.0.255
 network 10.251.24.0 0.0.0.255
 eigrp stub connected summary
 no eigrp log-neighbor-changes

*** Packet Capture is not possible...

Thanks

[nurbol555]

Both router have the same network (10.250.24.0/25 and 10.251.24.0/24), you have to deal with it