Switching

According to this doc: https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-729336.html the QSA also support 1Gig SFP optics. However, the document only mentions 1GE SX fiber SFP.Is the 1GE LX lackin...

Hi community, could someone explain me which is algorithm selection for multicast group when 2 RP are configured.If i remember well (sorry I didn't find nothing on Internet), RP with highest IP address wins, right ?For example:  ip access-list standa...

Hi, I have a query regarding the attached network. All the network protocols running are marked in the picture. Explaining about the network I have put the command default-information originate always on the OSPF configuration on the device iosvl2-3 ...

i have a 2960XR stack with 2 members.  my current IOS =c2960x-universalk9-mz.152-4.E3.bin  last night i attempted to upgrade to c2960x-universalk9-mz.152-6.E.bin  and I found that the system would not allow any clients to connect ( topic for another ...

I have a singlewire informacast setup working with PIM Sparse Dense mode across multaple sites. I have one meraki enviroment that I need to set up multicast routing to as well. currently all my interfaces are configured with "ip pim sparse-dense-mode...

my ospf neighbor today is in 2WAY/DROTHER state,the ospf has running for four years and no issue,  the ospf interface is up/up, but log says : neighbor from 2WAY to DOWN, Neighbor Down: Dead timer expired, what's the possible reason? how to fix

i have a 2960x that has this configurations ONLY i mean i haven't even added a host name VTP mode offspanning-tree mode rapid-pvstspanning-tree vlan 1 root secondryinterface vlan 1 ip add 10.1.1.2 255.255.255.0----------------------------------------...

we have local network working fine and mpls/vpn site to site fine, but last month, we implement voip. the internet access becomes very slow, but can connect. anyone can share the experience?, mostly is due to switch or voice gateway ?

in acs, we manage around a few hundred devices, how to search the device list that with syslog enabled? also I have one switch XYZ and 30 more switches, how to define syslog server name and trap for XYZ only? the rest 30 switches, i don't want to ass...

Hello everyone, I just had a problem on switch testing. After power on the catalyst 3750 switch, during the POST process the all LED's blinked except SYST LED,Its not blinked at all. After POST process is done the RPS LED remain solid green and the c...

Hi,Can someone explain me, why in OSPF, Why every area must be connected to area 0 and why those routes in areas which are not connected to area 0 are not being redistributed across the OSPF domain. ( which led virtual link concept i suppose )Why any...

Greetings all - I am trying to enable netflow on a new 3850-24 with ipservices.  I am leveraging LiveAction and have raised a ticket with them to help me through the issue, but more generally I'm confused about the lack of features I'm seeing. Per th...

Good afternoon everyone, I have the following problem:I bought 05 SW 2960XR, new, have come with IOS 15.2 (2) E6, have joined via via Cisco C2960X-Stack = modules.Everything has worked well, until I wanted to define my VTP. When I change the VTP mode...

Bandwidth limitation problems from layer 1 equipment and cabling            Migration from 1 to 10 Mbps for workstationsMigration from 10 to 100 Mbps for horizontal cablesMigration to greater than 100 Mbps for vertical cablesplease help how can i sol...