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just installed our first 10Gb uplink..2960s > 4510R with SUP7. link is running really slow. Users are unable to load data from remote databases on the LAN. We are getting a lot of "errors in". Is on new new SM Fiber install. Error In is showing on 4...

psiegling by Level 1
  • 2 replies
  • 0 Helpful votes

Hello,I have 2 x 3750's in a stack, switch 2 is the master.  We only have 5 hosts in each switch so we decided to move all hosts into switch to and removed switch 1 as we need it elsewhere.  Anyway all worked fine, but I wanted to tidy the config up ...

Hello everyoneWe have experienced a network outage due to a port-channel going down. Checking the logs we have seen the following messages:%SPANTREE-3-PRESTD_NEIGH: pre-standard MST interaction not configured (Port-channel3). Please, configure: 'span...

Hi,we are in the planning phase for a network upgrade. We have two C2960 Switches connected via one (L2) Etherchannel (4x1 Gbit/s) which works very well. In the next phase we would like to upgrade our router to an 2911 series which has 3 gb interface...

Hello,I have set up a dhcp server in a router for the wireless clients that exist in VLAN 10. I noticed that as soon as I set up the DHCP some strange "MACs" have been given IP (through the command sh ip dhcp bindings). After only a few minutes the p...

Resolved! Route Map?

Hello Community,I would like to know how to force all traffic from a specific network to go straight to the internet without being able to ping or otherwise communicate with my other networks eventhough there is a route in the routing table for them....

Craddockc by Level 3
  • 2 replies
  • 0 Helpful votes

Hello, i want to know if 1port of the 16 10Gbase-t Module (WS-X6716-10T-3C) for the Catalyst 6500E Series, can be connected to a 1Gbase Port of a 2900 ISR Routers, are they gonig to work at 1Gbps or, simply, they are not compatible? If it is true, ca...

djacksonv by Level 1
  • 7 replies
  • 0 Helpful votes

Hi,I have a 5K with 5 downstream 3560's. I now have a new 5k that I would like to add to the existing 5K as a HA peer. What is the best way to accomplish this with the least amount of downtime for the downstream switches.On the 3560's, i plan setting...

Here is my configuration. Why is it showing SDinterface Port-channel1 switchport access vlan 21 switchport mode access switchport nonegotiate no logging event link-status no snmp trap link-status spanning-tree portfastinterface GigabitEthernet1/0/9 s...

dukeminus by Level 1
  • 19 replies
  • 0 Helpful votes

Hi everybodyPlease consider the follwng exampleR1  ------T1------------------R2R1 has t1 controller in module/slot: 1/1So if I configure T1 controller installed in( module/slot) , 1/1 ,with channel-group 1, will it create a serial int on R1 as:int s1...

sarahr202 by Level 5
  • 4 replies
  • 0 Helpful votes

I'm trying to configure VXLAN on 1000v but it not working between two esx.As I followed the troubleshooting guide on Cisco's website I discovered the following error:  Can't get uplink MTU: 4681Here is the output of the "vemcmd show vxlan-stats ltl 5...

Vizibirka by Level 1
  • 1 replies
  • 0 Helpful votes

Hi,I have some basic doubts in basic OSPF adjacency formation.Assume a topology where in 5 routers R1..R5 are connected by a switch and R3 is the DR and R2 is the BDR. All these routers are fully adjacent. Now another router R6 is connected to LAN.Ca...

chid_1989 by Level 1
  • 16 replies
  • 0 Helpful votes