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Problem with DHCP

I have created a topology with three different networks and connected them to a single router and I have added HTTP,DNS,TELNET and DHCPHTTP, DNS,TELNET seems to work fine but my DHCP does not work properly it does not give default gateway to the end ...

Dual ISP BGP single Router failover issue

helloI have Dual BGP with two different ISP with single router and have two /24 prefixes. Load sharing working fine. Today we face an issue that is ISP-2 down several hops away and the Interface was up but one the prefix was not worki...

kazimjhon by Beginner
  • 10 replies
  • 0 Helpful votes

ACI L3out import restrictions

I'm working in my lab to test some config for an L3out where I need to restrict the importing of routes received to only routes that are tagged with certain communities. I'd like to have my config double checked to make sure I'm applying my config in...

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MPT3 by Beginner
  • 2 replies
  • 0 Helpful votes

Resolved! Static NAT to a range tcp ports

I want to map a range of tcp ports to an internal host from the internet. I could use the ip nat inside static tcp command for mapping an specific port, but what if I want to map the tcp port range from 8000 to 8050?, Is there a way to do that with ...

jose_gomez by Beginner
  • 11 replies
  • 0 Helpful votes

Virtual-Access2 Interface Flapping

Hello,I have noticed recently that one of my customers has been having an issue with their Virtual-Access interface constantly going up/down throughout the day, every day. Whenever it goes down, it also gets unbound from the Dialer profile. I am not ...

dleboeuf by Beginner
  • 3 replies
  • 5 Helpful votes

Resolved! Identifying IP MTU fragmentation issues

Not sure if I'm asking this question the right way. How do you know (or can you verify) if fragmentation actually becomes an issue? Let's say the WAN devices (in this case velocloud SDWAN) have the MTU set to 1280. As from what I understand Velocloud...

hmc2500 by Beginner
  • 10 replies
  • 0 Helpful votes

Cisco IOS and IOS XE Software differences

Considering we have the latest IOS XE version 17.+ with is supported and not EOL'd, and IOS 15.2E still being supported and an active version gets releases still, and with the software images being moderately similar they have some differences specif...

PaulSagar by Beginner
  • 5 replies
  • 0 Helpful votes

Adding 2nd ISP to Cisco 9300

I have a Cisco 9300 that currently uses our century link as our primary isp we recently got a Comcast Business modem and wanted to add this as a secondary to the same router. I’m a little confused as I’ve never done this before, so I assign the Comca...

chueymtz by Beginner
  • 16 replies
  • 0 Helpful votes

Resolved! C3850 Keep getting Error

there is no configuration done on the switch and it's empty, after rebooting the device gets an error. when i console only. Logs:- *Aug 31 14:32:26.089: %IOSXE-4-PLATFORM: Switch 1 R0/0: kernel: EDAC MC0: 1 CE DIMM 0 rank 0 bank 4 row 348 col 12598 o...

Resolved! Accessing NTP Server from another Subnet

Hello, Still quite new to networking. This question has been bothering me for a while.  How do i access a NTP server that is on another subnet?  I have attached a screenshot of a basic configuration. SW1 and SW2 can access the NTP clock, but SW3 cann...

Tom101 by Beginner
  • 9 replies
  • 0 Helpful votes