Switching

HI,I have a Cisco 2821 Router. Its ethernet Interface(E1) is connected to an ISP's Gateway.The outside interface IP is 207.x.x.1The ISP has given 6 public IPs (202.x.x.1- 202.x.x.6) to use in LAN.I have configured the router`s Internal Interface(E0) ...

Hi all, looking for documentation whats happen during a ISSU of N7K with dual SUP1 and a lot of FEXes which are all connected accross 4 different M1 Linecards.In my understanding there should no FEX be affected during this upgrade From 5.2.1 to 5.2.4...

Hi everybodyhttp://www.cisco.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/swdhcp82.htmlI quoted following from above link:1)The IP source binding table has bindings that are  learned by DHCP snooping...

hi all,im trying to set up a lab im doing,ive got most of it configured but am having a problem entering the enc dot1q command,im using a 3620 router on ios c3620-i-m ver12.31(13a),i have the vlans all set up on the switches and can get into subinter...

Hi everyone, Im trying to configure some ports to be forwarded out to a serial interface, we have installed voip phones (not cisco) and i want them to use only the serial port.this is the sh run output. needless to say i have erased some sentitive in...

Hi everybodyThe following discussion only focuses on dhcp snooping feature.  We further assume  only dhcp snooping is configured for all the scenarios i.e no ip source guard feature etc is enabled.Dhcp snooping combats two issues;Detection of rogue d...

hello, i am trying to ping 172.16.0.250 address from my desktop located in vlan 10.i can able to ping 172.16.0.250 from my L3 switch but not able to ping from my desktop belong to vlan 10.we have assing 172.16.0.254 ip to one interface fa 0/48.deksto...

Hi AllI'm working to configure route map to set high preferance for a specific subnet. I want to ensure the same routemap should not filter the other subnet routing advertisements. As far as I know route-map is like ACL,by default will there be expli...

Hellocan anyone tell  scalable design which meets the following requirementtwo main locations are 3KM distance . Each department has 3 seperate buildings distance between buildings are 30M . There should be VPN access and security with a firewall as ...

a 6509 and a 4506 with 2, 1gb interfaces in a portchannel.   Bring it up and everything is fine.  Save the config and reload either switch and the interfaces stay in Not Connected state.  Either doing a No Shut or a physical unplug the SFP and plug i...

First post, and I am fairly new at this, so please be gentle.My company has a Cisco IAD 2400 which is handling our phones and the internet (from Service Provider).  We are adding a second router, a Cisco 1921, to our network.I think I have everything...

I have a bunch of 3750x switches that each have a 10 gig routed link back to a central 4507 (loopback = 172.30.255.255).We carved up a /24 (of course, the /24 doesn't really exist except in our address tracking spreadsheet) into a bunch of /30's for ...