Wireless Access

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Access network design for branch, remote, outdoor and campus locations with Aruba access points, and mobility controllers.
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GRE tunnel Issue

  • 1.  GRE tunnel Issue

    Posted May 11, 2020 10:08 AM

    Hi Team,


    We are having issue with gre tunnel the tunnel is not coming up.


    Topology:

    Two DMZ controllers

    Multiple Local controllers.


    Configuration is as below.


    On MD:

    *#show datapath session | include 10.112.60.248

    10.112.60.248 10.226.100.92 47 0 0 0/0 0 0 0 local 6 0 0 F 11

    10.226.100.92 10.112.60.248 47 0 0 1/0 0 0 0 local 6 1 64 FC 11
    *#show running-config | begin "tunnel 702"

    interface tunnel 702

    description "Tunnel Description"

    tunnel mode gre 27

    tunnel source 10.226.100.92

    tunnel destination 10.112.60.248

    tunnel keepalive

    trusted

    no inter-tunnel-flooding

    tunnel vlan 572-574

     

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

     

    On DMZ

     

     

    #show datapath session | include 10.226.100.92

    10.226.100.92 10.112.60.248 47 0 0 0/0 0 0 1 local 13 0 0 F 6

    10.112.60.248 10.226.100.92 47 0 0 0/0 0 0 1 local 13 2 180 FC 6

    #show running-config | begin "tunnel 702"

     

    interface tunnel 702

    description "Tunnel Description"

    tunnel mode gre 27

    tunnel source 10.112.60.248

    tunnel destination 10.226.100.92

    tunnel keepalive

    trusted

    no inter-tunnel-flooding

    tunnel vlan 572-574

     

     

     

    Regards,

    Mallikarjun



  • 2.  RE: GRE tunnel Issue

    Posted May 11, 2020 11:18 AM

    Can you post the output of 'show interface tunnel [ID]' and is there a firewall between the two controllers with the required IP protocol open? 



  • 3.  RE: GRE tunnel Issue

    Posted May 11, 2020 12:49 PM

    Hi Craige,

     

    Thank you for the response.

     

    Please find the details below.

     

    #show interface tunnel 702

     

    Tunnel 702 is up line protocol is down

    Description: Tunnel Description

    Source  10.226.100.92

    Destination 10.112.60.248

    Tunnel mtu is set to 1100

    Tunnel is a Layer2 GRE TUNNEL

    Tunnel is Trusted

    Inter Tunnel Flooding is disabled

    Tunnel keepalive is enabled

    Keepalive type is Default

    Tunnel keepalive interval is 10 seconds, retries 3

            Heartbeats sent 797, Heartbeats lost 796

            Tunnel is down 2 times

    tunnel vlan 572-574

     

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

    as per the customer the firewall is open for gre protocol

    and also find the log below

    #show datapath session | include 10.112.60.248

    10.112.60.248   10.226.100.92   47   0     0      0/0     0    0   0   local       7    0          0          F               11

    10.226.100.92   10.112.60.248   47   0     0      1/0     0    0   0   local       7    1          64         FC              11

     

     

    Re



  • 4.  RE: GRE tunnel Issue

    Posted May 12, 2020 01:44 AM

    Hi Craig,

     

    Find the datapath tunnel table logs from both controllers.

     

    (HCAINNOI16F02DMZWLC02) #show datapath tunnel table | include 10.226.100.92

    9 10.112.60.248 10.226.100.92 47 1b 1100 0 0 0 0 0 0 00:00:00:00:00:00 0 223949 0 TLEFPRf

     


    (HTAINNOI21XXXWC01) *#show datapath tunnel table | include 10.112.60.248