hi,1) First question, What the best Backbone & layer 2 switch (must support Trunking) i'll buy on this scenarioBackbone Switch(support ACL)locate at Server roomLayer 2 Switch (support Vlan)use for every floor Switch. For Example for backbone, we conf...
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Forum Posts
VLAN1 administration is Down! How do I bring it up? The switch model 2950.tnx!
Hello,I have a Cisco7206VXR and find a log :" %PCMCIAFS-5-DIBERR: PCMCIA disk 2 is formatted from a different router or PC. A format in this router is required before an image can be booted from this device".I search it from CCO and find a solution t...
After upgrading the IOS I am seeing this on my 7100 for a prompt.Router(boot)>..any ideas as to what this is? I have followed several docs on Cisco site to no avail...the boot part always stays there....Thanks
Hi,we have a cisco 3560 channel/trunk to core 4506.when I type in "show interface counters errors" there are a lot of undersize errors on these channel ports. and my boss let me finger out why.and other switch (cisco 2950) have the same proble if thi...
Resolved! adding & removing VLAN tags?
As I recall, switches will add the VLAN tag on frames entering a VLAN configured port & remove the tag once the frame exits the switch. Assuming VTP is enabled in a LAN topology because all VLAN members do not reside on the same switch, is the VLAN...
i can see the GUI interface of cisco 3845 with SDM but unable to access it
Is it unwise to use a 2621 as a combined Frame Relay switch & terminal server in a home lab? Both functions seem to move a general-purpose router into the dedicated use category.Likewise, is it true than configuring a router to serve as a Frame Rela...
Hi,I have a 3550 running 12.2(40)SE, if I configure "aaa group server tacacs test" and add a server, it is removed after a reload. Its ok with radius.Its ok running 12.2.(25)SEE4.Anyone seen this issue and why?Thanks.Gary
Are there any other reasons to pick the 3750 over the 3560 for a branch office switch? I've seen where the main difference is in stacking, which is not really a factor for me.I have also been told that the lifespan of the 3750 will be longer than th...
Resolved! Can't get out from 3750 switch
I have 3 Vlans - Native, 20, 30. I have one host on 20 and 30 and they can talk to each other, but they both can't access the internet. Consoled from the switch I can ping the router, both Vlans, and websites. I am using the first ethernet port to ...
Resolved! Is it possible to block a MAC address?
I have been asked to block a MAC address on a router 1700 series, IOS 12.3(4)T2Is this possible? Help, thank you
I am ordering a WS-C3750G-12S-S. We need to connect it with a cat 5 cable. Because the specs for this switch say it has 12 SFP-based Gigabit Ethernet ports. Does that mean I should be able to connect this with a normal RJ45 connector ? I am goignt to...
Resolved! VLAN to VLAN Communications
On our 4510 switch we have multiple VLANs. Two of the VLANs have IP addresses assigned to the VLAN interface. I assumed that no inter-VLAN communication would take place until I used the 'ip routing' command. That's not the case though. I do have...
Does Cisco have a Best Practices guide for all the different ways of securing routers and switches, such as using SSH instead of telnet, building DOS ACLs, turning off small services, etc?
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