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6 votes

Is it possible to set up a DSL lab environment?

If I have a switch or laptop running a PPPOE server, could I go from ethernet-to-modem then connect the modem's WAN port to another modem's WAN port and have it connect via PPPOE? No. A DSL modem is ...
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  • 69.7k
5 votes
Accepted

Lab: I need to determine information about a device on a specific port of a Cisco multilayer switch

ARP is a protocol to resolve a layer-3 address to a layer-2 address. If there is no layer-3 address assigned to the device, then ARP cannot help you. Apparently, the device is sending frames because ...
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  • 93k
4 votes

How to ensure startup-config is not changed, building CCIE rack

Sorry, no. ROMMON can be told to ignore any NVRAM config, but there's no documented method to override the NVRAM startup-config. (Note: I'm aware of a US DoD contractor that does this, but they have ...
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  • 29.5k
4 votes

Can we run Linux guest OS in Cisco Packet Tracer?

Packet tracer is a simulator unlike GNS3 which is an emulator. so you cant run linux guest os in packet tracer
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  • 39
3 votes
Accepted

Can we run Linux guest OS in Cisco Packet Tracer?

Packet tracer is fairly limited. It is designed to let someone practice for the CCNA exams. It doesn't include all the IOS features, only a subset of commands that are useful for CCNA-level exercises. ...
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  • 93k
3 votes
Accepted

Connect two networks with one hidden

This is a common scenario. One way that this is done is with a firewall. You can place a firewall so that the test network/lab is on the outside of the firewall. That way, you can connect to the lab ...
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  • 93k
2 votes

Can we run Linux guest OS in Cisco Packet Tracer?

You should look into Cisco VIRL. Much more options and seems to be Cisco’s roadmap for emulation instead of packet tracer.
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1 vote

How to use VIRL Connect Tool

I finally managed to google a solution. https://learningnetwork.cisco.com/thread/102933 In VM Maestro -> Preferences -> Topology Editor -> uncheck the "Associate new connections with interfaces ...
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1 vote
Accepted

Virtual switch with port mirroring

You can use Open vSwitch. It has many enterprise grade features, including port mirroring. You will find on this documentation page the following information: Q: How do I configure a port as a ...
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  • 18.3k
1 vote

GNS3 - Telnet issue

When you want to telnet to a Cisco device, you must have a password configured for the VTY lines. Use something like this: line vty 0 15 logging synchronous exec-timeout 15 0 password <your ...
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  • 93k
1 vote

Alternative to Cisco APIC-EM for small lab

Catalyst SmartInstall for Zero Touch Switch Deployment SmartInstall can enable plug-and-play configuration and image management for zero-touch deployment on new and existing Cisco Catalyst LAN ...
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1 vote
Accepted

Alternative to Cisco APIC-EM for small lab

You have an ISR and a DHCP server, but you need a TFTP server, then you can just use SmartInstall for Zero Touch Switch Deployment: Abstract SmartInstall provides a suite of capabilities that help ...
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  • 93k
1 vote

How to connect to a physical device to a virtual server that is connected to a virtual router

Here is how you accomplish a virtual MT instance acting as gateway for a bunch of VMs. ESXi: Add 2 vSwitches. The first one is called "WAN" and you add the physical NIC to that switch. The second ...
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1 vote

How to ensure startup-config is not changed, building CCIE rack

The lab environment needs to be able to be torn up, torn down, erased, etc. IP connectivity is going to get messed up. That's the whole idea behind a terminal server and console ports. You might ...
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1 vote
Accepted

Lab cisco Pat not creating any translations

You have routing turned off, so the router won't forward packets. You can enable it with Ip routing Thanks to @ronmaupin for noticing that.
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  • 62.1k
1 vote
Accepted

Access list policy with odd and even filtering

When creating ACLs in a Cisco router, you use wildcard masks. Where you have a bit set to 0 in the wildcard mask, that bit must exactly match in the address. Remember that addresses and masks, ...
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  • 93k
1 vote

Separate network connection With One NIC

I would go with VLAN at the OS level. I suppose the students don't have administrative privilege on the operating system. If so you can configure 2 virtual adapters in the operating systems, one for ...
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  • 18.3k
1 vote
Accepted

CCNA Static Routing - Routers not able to ping each other

You don't have routes (either static or with a routing protocol) in the routers to reach the other router's loopback address. Routers should not have a default gateway (this is a rookie mistake), and ...
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  • 93k
1 vote

Named ACL Configuration

ACL placement is important, and the ACL design is dependent on whether it is inbound or outbound. The general rule for ACL placement is that extended ACLs should be placed as close to the traffic ...
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  • 93k

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