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Resolved! nativ vlan confusion

Dear All,  We have two sg300-52 managed switch connected via gi 52 with trunk ports. One of these (switchA) connected (via gi51) with an other cisco sf300-24p (switchVOIP) managed switch, which preconfigured and I don't know the configuration. This s...

Resolved! IP device tracking (duplicate IP address)

Hello Everyone, We are having issues with our Virtual server environment where servers come up with duplicate IP address for address 0.0.0.0 and server will stay offline until disable and re-enable nic.My research has led me to ip device tracking in ...

Resolved! Native VLAN and the "Black Hole"

While reviewing the configuration of a network that I'm supporting, it seems that the original design of the network has the black hole VLAN as the native VLAN.  At the least this seems incorrect, and possibly very dangerous, but I'm not exactly sure...

Resolved! Catalyst 6509 IOS code versions

  Is Cisco moving away from the 12.2 SX  trains and on to  15.X trains only ?  Currently they have the 12.2 SXJ train , will there be any other 12.2 codes after this? Will they move to like SXK after this or should we move to the 15.X trains even tho...

glen.grant by • VIP Alumni
  • 299 Views
  • 1 replies
  • 0 Helpful votes

Interesting physical issues

We just finished wiring a building and turning up new switches on our campus. I have been running into issues where the wire run has caused an interesting issue. This building is set up with two stacks of two 2960s switches (one stack with two ws-296...

Network Analysis

Hi friends,We have a L3 4506 Switch on when we have created a L3 interface which has a dedicated 20mbps link, prior the link was free but now its completely used.Now we want to know which ip's are using it, who are the top talkers n for that one opti...

sai.vaste by • Level 1
  • 205 Views
  • 1 replies
  • 0 Helpful votes

Resolved! LACP using 2x 10G ports not showing 20G?

I currently have etherchannel configured to 2x 10g ports.Cat_6509#sh run int ten8/1Building configuration...Current configuration : 156 bytes!interface TenGigabitEthernet8/1 switchport switchport mode trunk channel-group 42 mode desirableendCat_6509#...

steven.t27 by • Level 1
  • 11843 Views
  • 8 replies
  • 0 Helpful votes

FTP server can't get past gateway

I have a Cisco 1941 ISR and a SG300-20 switch in my home lab with several VLAN's. I have a web server and an FTP server that normally can be accessed from the outside world, however, currently, my FTP server cannot get past my router. My network layo...

wan problem plz help

i have vlan separated by a switch my pc's can communicate on their own lans but not across the wan can anyone help me pleaserouter 1Router#show runBuilding configuration...Current configuration : 1004 bytes!version 12.4no service timestamps log datet...

cwynne001 by • Level 1
  • 244 Views
  • 2 replies
  • 0 Helpful votes

Resolved! VLAN tagging and tagging question

Hello, I have a question about VLAN tagging on a Cisco switch. I've learned that switches tag frames with VLAN IDs once the frame enters a Trunk port (not when it enters a VLAN port).Now, if two computers from the same VALN and on the SAME switch tal...

yosefshai by • Level 1
  • 423 Views
  • 4 replies
  • 0 Helpful votes

Interrupt Catalyst boot process

After entering the command "boot enable-break" in configuration mode ("Enable Break" under "show boot" now shows "yes") the switch will stop loading IOS if you send it a break via the console port while it is loading the IOS.  It will then give the m...

pascal by • Level 1
  • 11300 Views
  • 1 replies
  • 0 Helpful votes

iSCSI and Dell PowerConnect 6224

We have a Virtualization project in the early design stages utilizing VMWare and a iSCSI SAN environment.We are a Cisco only data center at present, but one vendor quote has all Dell equipment included.For switching they have specified the PowerConne...

Resolved! Cisco 7609 RSP720-3CXL-GE "mls cef maximum-routes"

We receive syslog warnings that we run  to the threshold for the maximum supported mpls routes in the CEF table, below some information.What is the impact/risc if the threshold is exceeded?What is the service impact when increasing the settings?What ...

jkwakman by • Level 1
  • 10981 Views
  • 6 replies
  • 0 Helpful votes
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