+ Post New Thread
Results 1 to 10 of 10
Wireless Networks Thread, VLAN CONFIGURATION in Technical; Hi, Im a noob to VLANs and I am having some trouble getting my head around it. Any help would ...
  1. #1

    Join Date
    Aug 2007
    Location
    Devon
    Posts
    5
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0

    VLAN CONFIGURATION

    Hi,

    Im a noob to VLANs and I am having some trouble getting my head around it. Any help would be great, thank you in advance.

    I have HP Procurve switches 5412zl in the core and 2650 on the edge. I have setup vlans between switches without any problems. I also have DHCP serving IP Addresses within both VLANs.

    My setup:
    default VLAN(1) - IP Range 10.2.104.0/21
    second VLAN(11) - IP Range 192.168.4.0/22.

    My default gateway is 10.2.111.254, how can I get VLAN(11) to access the internet/default gateway?

    Here is part of running configuration of the 5412zl:

    ip routing
    ip irdp
    timesync sntp
    snmp-server community "public" Unrestricted
    vlan 1
    name "DEFAULT_VLAN"
    untagged A1-A23,B1-B24,C1-C24,D1-D24,E1-E24,F1-F4
    ip address 10.2.111.210 255.255.248.0
    no untagged A24
    ip igmp
    exit
    vlan 11
    name "CURRIC_WRC"
    untagged A24
    ip helper-address 10.2.104.1
    ip address 192.168.4.1 255.255.252.0
    tagged A12,D5,D7,F2
    exit
    ip route 0.0.0.0 0.0.0.0 10.2.111.254
    spanning-tree

  2. #2

    Join Date
    Oct 2007
    Location
    Lincolnshire
    Posts
    133
    Thank Post
    0
    Thanked 22 Times in 22 Posts
    Rep Power
    17
    Are your clients in VLAN 11 getting the default gateway 192.168.4.1?

  3. #3

    Join Date
    Aug 2007
    Location
    Devon
    Posts
    5
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Yes the clients default gateway is set via DHCP to 192.168.4.1.

    192.168.4.1 is the 5412zl Core Switch.

    I forgot to mention the Servers and Switches/Router are in the default VLAN(1). When I ping the router 10.2.111.254 from a client on the 192.168.4.0/22 range I get "Request timed out".

  4. #4

    Join Date
    Oct 2007
    Location
    Lincolnshire
    Posts
    133
    Thank Post
    0
    Thanked 22 Times in 22 Posts
    Rep Power
    17
    It looks like there's a problem with routing on your switch. Can you run 'show ip' and 'ip route' on your core switch and post the result?

  5. #5

    Join Date
    Aug 2007
    Location
    Devon
    Posts
    5
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    Thanks for getting back so quick:


    SW-BRC_LIB-01# show ip

    Internet (IP) Service

    IP Routing : Enabled


    Default TTL : 64
    Arp Age : 20
    Domain Suffix :
    DNS server :

    VLAN | IP Config IP Address Subnet Mask Proxy ARP
    -------------------- + ---------- --------------- --------------- ---------
    DEFAULT_VLAN | Manual 10.2.111.210 255.255.248.0 No No

    CURRIC_WRC | Manual 192.168.4.1 255.255.252.0 No No



    SW-BRC_LIB-01# show ip route

    IP Route Entries

    Destination Gateway VLAN Type Sub-Type Metric Dist.
    ------------------ --------------- ---- --------- ---------- ---------- -----
    0.0.0.0/0 10.2.111.254 1 static 1 1
    10.2.104.0/21 DEFAULT_VLAN 1 connected 1 0
    127.0.0.0/8 reject static 0 0
    127.0.0.1/32 lo0 connected 1 0
    192.168.4.0/22 CURRIC_WRC 11 connected 1 0

  6. #6

    Join Date
    Oct 2007
    Location
    Lincolnshire
    Posts
    133
    Thank Post
    0
    Thanked 22 Times in 22 Posts
    Rep Power
    17
    That looks okay. I thought you were saying you couldn't ping your switch but, now that I've read your question properly ( ), I see what's happening. It looks like you just need to add a route to the device at 10.2.111.254 to tell it how to reach the 192.168.4.0 subnet. Have you got admin access to that router?

  7. #7

    Join Date
    Aug 2007
    Location
    Devon
    Posts
    5
    Thank Post
    0
    Thanked 0 Times in 0 Posts
    Rep Power
    0
    I though it was something to do with the router. No I dont have admin rights, the router was supplied by SWGFL.

    Is there any other way round it?

  8. #8

    Join Date
    Oct 2007
    Location
    Lincolnshire
    Posts
    133
    Thank Post
    0
    Thanked 22 Times in 22 Posts
    Rep Power
    17
    Presumably the gateway router has been configured to route your 10.2.111.210 subnet only, so 192.168.4.0 isn't going to work. I thought perhaps you could use NAT on your switch to translate the addresses into the 10... range, but your switch doesn't seem to support that.

    Do you really need routed internet access from that subnet? If you just want web acces you could install a proxy server on VLAN 1.

  9. #9
    MicrodigitUK's Avatar
    Join Date
    May 2007
    Location
    Wiltshire
    Posts
    334
    Thank Post
    37
    Thanked 55 Times in 51 Posts
    Rep Power
    24
    Quote Originally Posted by cgorms View Post
    I though it was something to do with the router. No I dont have admin rights, the router was supplied by SWGFL.

    Is there any other way round it?
    I had exactly the same problem and it is the SWGFL routers IP rules.

    With the old ISDN routers the SWGFL didn’t used to block the traffic but when they upgraded everyone to fibber they changed the ACL’s (access control lists) to only allow your designated IP range network traffic through by default.

    I have an open Wi-Fi network in a privet IP range routing through my SWGFL network.

    If you call them up and explain the situation and give them the IP range they can make the appropriate changes to there routers ACL’s.
    Last edited by MicrodigitUK; 16th April 2009 at 06:19 PM.

  10. #10
    eduabncs's Avatar
    Join Date
    Aug 2005
    Location
    somewhere in the midlands
    Posts
    394
    Thank Post
    31
    Thanked 21 Times in 19 Posts
    Rep Power
    28
    Is the VLAN on the router and is uplink port trunked?

SHARE:
+ Post New Thread

Similar Threads

  1. Central VLAN Configuration
    By rosswilson in forum Wireless Networks
    Replies: 1
    Last Post: 15th March 2009, 08:10 PM
  2. Procurve VLAN help
    By meastaugh1 in forum Wireless Networks
    Replies: 8
    Last Post: 4th September 2008, 08:29 PM
  3. To Vlan or not Vlan?
    By Theblacksheep in forum Wireless Networks
    Replies: 33
    Last Post: 19th August 2008, 03:22 PM
  4. VLAN Configuration
    By robknowles in forum Wireless Networks
    Replies: 1
    Last Post: 28th May 2008, 04:01 AM
  5. vlan and dhcp
    By Uraken in forum Wireless Networks
    Replies: 2
    Last Post: 17th March 2008, 11:18 AM

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •