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  1. cyberspace

    Extreme stack and DHCP

    Do you have dhcp relay configured on the Voice VLAN? Does it work if you plug a phone into a port which is untagged on voice vlan only? It would be worth setting up a mirror to a port, plugging in a phone, and then observing the traffic in a wireshark trace 'When all else fails.......read the...
  2. cyberspace

    3Com 4500 Web/SNMP access from different networks

    Yes, the switch needs a default gateway to allow management from other networks. You can do this with ip route-static 0.0.0.0 0.0.0.0 <next hop ip> 'When all else fails.......read the manual'
  3. cyberspace

    DHCP prevent use of static IP addresses

    Are the workstations windows? If they have limited accounts then they cannot modify TCP/IP configuration..so that's one possible solution. 'When all else fails.......read the manual'
  4. cyberspace

    One to One NAT Cisco 800 Series on same side?

    I have a requirement to NAT from 10.0.0.1 to 192.168.0.1. I have a spare Cisco 800 series lying around, which has a built in 4 port switch. The WAN interface is for ADSL, so is not a fast ethernet interface. I am not sure if it's going to be suitable for what I need. I tried this command: ip...
  5. cyberspace

    Why cvs client on suse10 can block ping?

    Have you added exceptions to the SuSE firewall via Yast? IF SAFE TO DO SO try the command "SuSEfirewall2 stop" and try again Also is SSH configured to run at the runlevel you are using? Check it out with "rcsshd status" - if it's set to "unused" then to need to set it to autostart with...
  6. cyberspace

    Restrict traficc for MAC Address

    Which switches are you using? I ask because on the 4800G for example there is a feature called vlan security which will I think will accomplish what you are after. 'When all else fails.......read the manual'
  7. cyberspace

    Basic VLAN Setup across multiple switches

    Just thought I'd add my 2 cents. As the 5500-EI is a Layer 3 switch then one of the switches will become the router for inter-vlan traffic. What I do is have IP addresses on VLAN 1 for management on every switch, but only 1 switch has an IP interface for the voice VLAN and this becomes the...
  8. cyberspace

    A little confused with Hybrid Ports and Tagging on single stacks

    It's quite odd. I wonder if it's a bug? I tested this: interface GigabitEthernet1/0/9 port link-type hybrid port hybrid vlan 1 untagged port hybrid vlan 7 untagged And then if I do a look at the interface: [4800G]dis int gig 1/0/9 GigabitEthernet1/0/9 current state: DOWN IP Packet Frame...
  9. cyberspace

    A little confused with Hybrid Ports and Tagging on single stacks

    Ps - I forgot to add, that my present understanding is that an untagged packet just goes onto the native VLAN of the port, as per the ports PVID. If I set the hybrid port to vlan 1 untagged and vlan 2 untagged, how will it know what to do with traffic on vlan 2? 'When all else fails.......read...
  10. cyberspace

    A little confused with Hybrid Ports and Tagging on single stacks

    For some reason I was under the impression that on a 5500 switch, only 1 vlan (when in hybrid mode) could be set as untagged. However I see on the 4800 I can have several VLANs untagged. When the switch is on it's own (that is, a single stack, no other switches to connect to), what is the...
  11. cyberspace

    ML110 RAID Setup

    Hi Blister, thankyou for the detailed response. The disks are on the same controller, yes. Your point about making a separate array/logical drive makes perfect sense. Didn't think of that! I have now done that and I can see the 250GB disk. Fair point about the boot volume. This isn't a...
  12. cyberspace

    ML110 RAID Setup

    Hi, I am trying to configure an ML110 as follows: 1 x 250GB Drive, standalone, OS Disk 2 X 1TB drives, RAID1, Data disk When I enable the SATA mode to RAID and create a logical disk, that all works OK, but when I try to install the OS, the boot controller is seen as the 1TB array and I am...
  13. cyberspace

    Migrating domain

    You could do it if you have the two domains in separate broadcast domains (so new and old DHCP won't clash) You could use port based VLANs or even a new/spare switch not connected to the old one with New DC's and PC's attached, and move PC's over. All down to the scale of the task I suspect...
  14. cyberspace

    The system detected a possible attempt to compromise security.

    Are you using roaming profiles? I know that some of my users have problems moving between 32 and 64 bit machines... 'When all else fails.......read the manual'
  15. cyberspace

    The system detected a possible attempt to compromise security.

    Are you logging on to the same DC each time? How many do you have in the domain (or site?) It sounds like you are being warned of a potential man in the middle attack but indeed it may be caused by something else. When you get the dodgy display have you tried opening up a command prompt and...
  16. cyberspace

    Layer 3 Interfaces for VLANs

    Thanks for that chaps, had a feeling that would be the case. Didn't seem logical to me. Jimbo, these are 3Com switches and operate in a similar manner to what you have described. 'When all else fails.......read the manual'
  17. cyberspace

    Should I subnet my network?

    Based on what the original poster has said, I think changing the network mask to 255.255.254.0 is going to give by far the least headaches. Also with a mask of 255.255.254.0 you get 510 hosts per subnet...thus 192.168.111.x would not talk to 192.168.222.x without a router so be careful with...
  18. cyberspace

    Layer 3 Interfaces for VLANs

    I have a question regarding VLANs and associated layer 3 interfaces. I have say VLAN10 on a core switch. There are 3 switches connected to this via fibre for edge devices. VLAN10 exists on all switches, and the switch to switch links are set as trunks and allow vlans 1 and 10 (3com switches...
  19. cyberspace

    4800G DHCP Relay Issues

    Turns out I missed a command - just in case anybody else has the same issue. interface Vlan-interface7 ip address 10.1.2.1 255.255.255.0 dhcp select relay dhcp relay server-select 1 'When all else fails.......read the manual'
  20. cyberspace

    4800G DHCP Relay Issues

    On the 5500G setting up DHCP relay was simply a process of setting a dhcp server and then using almost the same command at the VLAN interface level. This doesn't appear to be the case with the 4800G. I have a single stack with 2 units, currently in use for testing. I have attached one of the...

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