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Access network design for branch, remote, outdoor, and campus locations with HPE Aruba Networking access points and mobility controllers.
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620: Getting uplink and cable modem working

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  • 1.  620: Getting uplink and cable modem working

    Posted Feb 08, 2014 03:29 PM

    Greetings all, I have a 620 and trying to get a cable modem attached to the uplink to get internet, but no dice for some reason.

     

    I used the following as a reference:

     

    http://community.arubanetworks.com/t5/Command-of-the-Day/COTD-Connect-your-Aruba-Controller-to-a-Cable-Modem/m-p/951#M64

     

    but still a bit stuck. VLAN 20 isn't pulling an IP for some reason.

     

    My observations and questions:

    • Created VLAN 20 dedicated to the uplink, and only port 1/8 is assigned to this VLAN
    • VLAN 20 is showing UP, but it is not pulling an IP address from the cable modem
       (see show ip interface brief and show ip route below)
    • #ip default-gateway import isn't working for me per the reference above
    • Is trunking required? I enabled that on 1/8 and allowed all VLANs to access it

     

     

    uplink-1.jpg

     

    (Cocoa-620) #show ip interface brief

    Interface                   IP Address / IP Netmask        Admin   Protocol
    vlan 1                    172.16.0.254 / 255.255.255.0     up      up  
    vlan 20                     unassigned / unassigned        up      up
    vlan 100                  10.1.100.254 / 255.255.255.0     up      up  
    vlan 200                  10.1.200.254 / 255.255.255.0     up      up  
    loopback                    unassigned / unassigned        up      up  
    mgmt                        unassigned / unassigned        down    down

    DHCP is enabled on VLAN(s) 20

     

    // ----------------------------------------- //

     

    (Cocoa-620) #show ip route

    Codes: C - connected, O - OSPF, R - RIP, S - static
           M - mgmt, U - route usable, * - candidate default

    Gateway of last resort is Imported from DHCP to network 0.0.0.0 at cost 10
    Gateway of last resort is Imported from CELL to network 0.0.0.0 at cost 10
    Gateway of last resort is Imported from PPPOE to network 0.0.0.0 at cost 10
    C    172.16.0.0 is directly connected, VLAN1
    C    10.1.100.0 is directly connected, VLAN100
    C    10.1.200.0 is directly connected, VLAN200

     

     

    uplink-4.jpg

     

    uplink-2.jpg

     

    uplink-3.jpg



  • 2.  RE: 620: Getting uplink and cable modem working

    EMPLOYEE
    Posted Feb 08, 2014 03:31 PM

    If the cable modem is plugged directly into port 8, then the port should be access vlan 20, not trunk.



  • 3.  RE: 620: Getting uplink and cable modem working

    EMPLOYEE
    Posted Feb 08, 2014 03:55 PM

    Some cable modems remember only the last device that plugged into them and need to be rebooted to accept a new device.  Try rebooting.



  • 4.  RE: 620: Getting uplink and cable modem working

    Posted Feb 08, 2014 05:14 PM

    HUH! OK, so if you notice, in the 1/7 port config, "Firewall Policy" section, "uplink-firewall" was selected. Once I removed that, it picked up a public IP address from the cable modem!

     

    (Cocoa-620) #show ip interface brief

    Interface                   IP Address / IP Netmask        Admin   Protocol
    vlan 100                  10.1.100.254 / 255.255.255.0     up      up  
    vlan 1                    172.16.0.254 / 255.255.255.0     up      down
    vlan 20                 98.122.254.254 / 255.255.240.0     up      up  
    vlan 200                  10.1.200.254 / 255.255.255.0     up      up  
    loopback                    unassigned / unassigned        up      up  
    mgmt                        unassigned / unassigned        down    down

    DHCP is enabled on VLAN(s) 20

     

    A few more questions before (hopefully) success:

    • Although now that VLAN 20 (uplink) has an IP address, does it need routing rules? I haven't set those, but looks like cjoseph's requirement (see this doc) to add default gateway and DNS importing is needed. Maybe manually set a static route to the cable modem's gateway?

    (Cocoa-620) (config) #ip default-gateway import
    % Incomplete command.

     

    (Cocoa-620) (config) #dns-server import
                                     ^
    % Invalid input detected at '^' marker.

     

     

    ip-routes.jpg

     

     

    • I also removed what I thought was a firewall. I assume that's bad.

     



  • 5.  RE: 620: Getting uplink and cable modem working

    Posted Feb 08, 2014 05:51 PM

    Another data point:

     

    I am able to resolve DNS and ping out to 'clock.redhat.com' from the console, but cannot do either from any clients that were given DHCP addresses by the controller - wired, or wireless (should be the same, they are on the same VLAN with same DHCP rules).



  • 6.  RE: 620: Getting uplink and cable modem working
    Best Answer

    EMPLOYEE
    Posted Feb 08, 2014 05:53 PM
    What is the role of those clients? Do you have IP Nat inside on your client VLAN?


  • 7.  RE: 620: Getting uplink and cable modem working

    Posted Feb 08, 2014 06:44 PM
    @cjoseph wrote:
    What is the role of those clients? Do you have IP Nat inside on your client VLAN?

    I did not have Source NAT enabled for any of the VLAN interfaces. Assuming this needs to be enabled for all private VLANs, including the uplink VLAN? Good call!



  • 8.  RE: 620: Getting uplink and cable modem working

    Posted Feb 08, 2014 06:48 PM
    @cjoseph wrote:
    What is the role of those clients? Do you have IP Nat inside on your client VLAN?

    cjoseph++

     

    I owe you a beer if you are ever in Durham, NC. My employee WLAN works perfectly, now need to tackle the Guest with captive portal.