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RickInman

updated

21 years ago

R

RickInman

5 Posts

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12735

February 28th, 2006 14:00

6024 routing

I have a 5324 setup with 3 vlans feeding a 6024. While I can route traffic from vlan to vlan on the 6024, I can't route traffic from vlan to one of our production networks (i.e. 5.X). Any feedback would be greatly appreciated.

Here is the running config on the 6024

Router Configuration
-----------------------------

interface ethernet g24
switchport mode trunk
exit
vlan database
vlan 10,20,30
exit
interface ethernet g24
switchport trunk allowed vlan add 10
exit
interface ethernet g24
switchport trunk allowed vlan add 20
exit
interface ethernet g24
switchport trunk allowed vlan add 30
exit
interface ethernet g1
ip address 192.168.11.253 255.255.255.0
exit
interface vlan 10
ip address 192.168.70.253 255.255.255.0
exit
interface vlan 20
ip address 192.168.79.253 255.255.255.0
exit
interface vlan 30
ip address 192.168.209.253 255.255.255.0
exit
ip route 0.0.0.0 0.0.0.0 192.168.11.20
ip route 192.168.5.0 255.255.255.0 192.168.11.244
ip route 192.168.6.0 255.255.255.0 192.168.11.244
ip route 192.168.10.0 255.255.255.0 192.168.11.244
ip route 192.168.11.0 255.255.255.0 192.168.11.244
ip route 192.168.100.0 255.255.255.0 192.168.11.244
ip route 192.168.201.0 255.255.255.0 192.168.11.244
interface ip 192.168.11.253

and this is the running config for the 5324....

spanning-tree mode rstp
interface ethernet g24
switchport mode trunk
exit
vlan database
vlan 10,20,30
exit
interface range ethernet g(1-10)
switchport access vlan 10
exit
interface ethernet g24
switchport trunk allowed vlan add 10
exit
interface range ethernet g(11-16)
switchport access vlan 20
exit
interface ethernet g24
switchport trunk allowed vlan add 20
exit
interface range ethernet g(17-20)
switchport access vlan 30
exit
interface ethernet g24
switchport trunk allowed vlan add 30
exit
  • DELL-Cuong N.

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    Posted February 28th, 2006 17:00

    Which port connects your 5324 to the 6024?  Is it port 24 on 5324 connects to port 24 on 6024?  Port 1 on 6024 is not a member of any VLAN at this point based on your configuration.  Is that the port (g1) that connects to the rest of your production network?  Is it connecting to another switch?  Do you want the 10,20,30 VLANs to get trunk out that port (g1)?  If so, perhaps you need to configure port 1 as a trunk port similarly to how you configured the port 24?

    Cuong.

  • DELL-Cuong N.

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    Posted February 28th, 2006 17:00

    How is the host on the internal network configured?  Is it configured with a default gateway?
     
    Cuong.
  • RickInman

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    0

    Posted February 28th, 2006 17:00

    Port g24 on the 5324 connects to port g24 on the 6024 and is a trunked port. Port g1 on the 6024 is the port that is connected to our production network. I gave g1 an address on our production network 192.168.11.253 I can ping from the 6024 to points on our production network but I can't from a host connected to the vlans on the 5324. When I do a tracert to a host on the production network from a host on a vlan it dies after finding that vlans next hop. It's like the internal routes aren't seeing the external routes in the static route table

    console# show ip route
    Maximum Parallel Paths: 4 (4 after reset)

    Codes: C - connected, S - static, R - RIP, O - OSPF, E - OSPF external

    S 0.0.0.0/0 [1/1] via 192.168.11.20 1:24:27 g1
    S 192.168.5.0/24 [1/1] via 192.168.11.244 1:24:27 g1
    S 192.168.6.0/24 [1/1] via 192.168.11.244 1:24:27 g1
    S 192.168.10.0/24 [1/1] via 192.168.11.244 1:24:27 g1
    C 192.168.11.0/24 is directly connected g1
    S 192.168.11.0/24 [1/1] via 192.168.11.244 Backup Not Acti
    C 192.168.70.0/24 is directly connected vlan 10
    C 192.168.79.0/24 is directly connected vlan 20
    S 192.168.100.0/24 [1/1] via 192.168.11.244 1:24:27 g1
    S 192.168.201.0/24 [1/1] via 192.168.11.244 1:24:27 g1
    C 192.168.209.0/24 is directly connected vlan 30



    I am setting this up to prototype a network upgrade accross all of our facilities where the 6024 will be taking over the internal routing duties now handled by a cisco router that is managed by sprint.
  • RickInman

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    Posted February 28th, 2006 17:00

    Yes, I reran ipconfig on the host to confirm it hasn't changed it is

    IP 192.168.79.1
    Net Mask 255.255.255.0
    Default Gateway 192.168.79.253

    This host is on vlan 20
  • DELL-Cuong N.

    1017 Posts

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    Posted February 28th, 2006 21:00

    We just tried your setup - seems to work for us.  Let's check some things:

    • Are you using Windows for your workstation?  If so be aware that Windows allows you to configure a default gateway per interface and it is know that it gets confused sometime and pickup the wrong default gateway.
    • You mentioned that from the 6024 you can ping into the hosts on the internal VLAN and also out to the production network correct?  If so, let's try this:
      • From the host on the VLAN, can you ping the interface on the 6024?  For example, from the host 192.168.79.1 can you ping your default gateway 192.168.79.253?
      • Then from your 192.168.79.1 interface can you ping the other interfaces on the 6024 such as the 192.168.11.253?

    By systematically pinging the different segments, perhaps we can try to isolate the problem to the segment.  If you fail to get to the gateway then perhaps the problem is on the host.  If you can get to the gateway (192.168.79.253) but not to the external interface (192.168.11.253) then perhaps the problem is on the router.  If you can get through both but then cannot ping external addresses then perhaps the problem is at the next hop?  Try pinging the address of the router at the next hop (I'm assuming that's 192.168.11.244 or 192.168.11.20).  Perhaps it is the next hop that's not configured correctly?

    Cuong.

  • RickInman

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    Posted March 1st, 2006 12:00

    Here are the test results:

    ping test

    From host ip# 192.168.79.1 (vlan 20)To default gateway 192.168.79.253 (vlan 20)Passed
    host ip# 192.168.79.1 (vlan 20)To default gateway 192.168.70.253 (vlan 10)Passed
    host ip# 192.168.79.1 (vlan 20) To port g1 on 6024 192.168.11.253 Passed
    host ip# 192.168.79.1 (vlan 20) To default gateway 192.168.11.244 Failed request timed out

    From 6024 to host on vlan 20 192.168.79.1 Passed
    6024 to default gateway for vlan 20 192.168.79.253 Passed
    6024 to default gateway for vlan 10 192.168.70.253 Passed
    6024 to default port g1 on 6024 192.168.11.253(on production network)Passed
    6024 to default gateway for production network 192.168.11.244 Passed
    6024 to host on production network 192.168.5.14 Passed

    When I do a tracert from host 192.168.79.1 to production network 192.168.11.244 I get the first hop of 192.168.79.253 but then it I get request timed out. It acts like it can't find the route to that network. Can you send the running config on the 6024 that you have and I can compare it to mine and see if I have missed something?
  • DELL-Cuong N.

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    Posted March 1st, 2006 13:00

    The configuration we use is the exact same configuration you sent us.  We just loaded your configuration into our switch and test with it.  Note that in our setup the next hop from the 6024 is just the workstation we are pinging to.  We think the problem is at the next hop beyond the 6024 given that you can ping from the host on the VLAN all the way to the interface leaving the 6024 to the production network.  So you know that your packet is being routed to the appropriate interface so the question is why the next hop (the gateway beyond the 6024) doesn't response to the ping.  Do you have control over the router at the next hop?  Is it a router managed by your service provider or is it one of your own?  If its a service provider router perhaps it is blocking ping or it is incorrectly configured?

    You might try isolating your test setup with your own router beyond the 6024 to simulate the service provider router then see if you can ping to it first.  If you can, then your setup is good and its just a question of what's happening on the next hop in the service provider network.

    Cuong.

  • RickInman

    5 Posts

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    Posted March 1st, 2006 14:00

    The production router I am connected to is managed by Sprint. I can call sprint and get a new static routes added to the production router that points to 192.168.79.0 and 192.168.70.0 and see if that clears up the problem.