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1500 questions
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2 answers

Why can I ping IP addresses from 127.0.0.1 to 127.255.255.254?

I thought that the loopback IP address of my machine is 127.0.0.1. I do not understand why am I able to ping IP addresses until 127.255.255.254.
yoyo_fun
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1 answer

Hp Procurve Action ignored in download mode

From an tftp server I'm trying to import the config to startup-config using copy tftp startup-config 10.0.0.10 5006zl.cnf The switch asks for confirmation y/n and when pressing y it just aborts saying that the config could not be loaded. show…
Valentin Bajrami
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2 answers

Do i need to configure VLANS on my router/firewall or just the switch?

I finally took time to map my entire shitty network to understand exactly what the guy before me did, and i must admit i'm a little bit surprised even if i'm not a network expert... Just take a look at That Diagram i made so you can have a better…
Thierry Dalleau
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6
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1 answer

Cisco 2690x-Flex stack not working

I have 2 identical Cisco 2690x with flex stack plus modules installed in both. I have provisioned the first and it is up and running. When I add the second to the flex stack module and turn it on, it powers up and the flex stack indicator is green,…
Chris Kooken
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6
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3 answers

Network Tunneling - why do we need it?

I have researched the topic of Network Tunnel but the information on this is rather confusing and inconsistent. So could someone please explain: In general, What is tunneling? Is it simply an act of encapsulating a packet with another header and…
user34639
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Router Ethernet port ip no accessible from clients

I have this setup with a hybrid of equipment's from Cisco and Ubiquiti Edge routers and Vyos. My Cisco Nexus configured with HSRP with all the SVI's on 192.168.1.243 as the active on HSRP and SVI's all on area 0.0.0.0 with SVI interfaces on…
Usaia Tawakevou
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4 answers

Ping a private IP address in another network

We all know that PCs on a LAN use private IP addresses such as 192.168.2.3, etc. Now my question is, how can a PC say mine having a private address of 192.168.2.3 communicate with other LAN PC having a private address of say 192.168.2.5 because not…
RRHS
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3 answers

How IP helper address works?

How IP helper address works and what is the difference between dhcp and IP helper-address .please explain in brief.
Harsha D
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6
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2 answers

Fortigate 100D internet on VLAN wan port

I am fairly new towards Fortigate firewalls and I am trying to set up one FortiGate 100D running firmware v5.0 as a router for a hotel network. I have 2 ISPs using PPPoE connection that runs on VLAN 500. I created VLANs for both wan1 and wan2…
Kenny Yap
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6
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3 answers

MPLS traffic engineering

While studying MPLS I couldn't understand it's one basic functionality. Mpls creates tunnel interfaces or pseudowires between label edge routers. To achieve traffic engineering I can set different limits on different tunnels. But what decides which…
john
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Is IKEv2 remote access VPN possible to an ASA 5510 without Cisco AnyConnect as the client?

I'm trying to configure a remote acccess vpn into a cisco ASA 5510 (9.1(7)15). I want to be able to use IKEv2 with Certificate + user/password xauth with strongswan as the client under Ubuntu. I have this working for an IKEv1 tunnel after much…
Chris Holt
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6
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2 answers

Ethernet padding

I'm using Wireshark for my project. I sent a ping over to Google.com and Wireshark said that the length was 57 bytes(when I received the reply it was 60 bytes long and it contained 6 bits of padding. After I decided to send another packet that…
user35754
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6
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2 answers

Full Duplex and Collision Domain

I have a very basic query on Collision Domain and Full Duplex Mode. There are two types of logical topology: Ethernet and Token Ring . Whenever we read about Ethernet the first thing that we are taught is CSMA/CD. It says that in Ethernet two…
Pratyush
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6
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1 answer

Why doesnt Bluetooth Low Energy interfere with Wifi

so the BLE advertising channels are located at 2402Mhz, 2426Mhz and 2480Mhz. That is so it does not interfere with the 3 wifi channels in the 2.4Ghz band. My question is especially about the 2426Mhz advertising channel. Wifi channel 6 ranges from…
User Name
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1 answer

Responsibility of the physical sublayers of Ethernet

I'm learning about Ethernet and the sources I've found seem to be controversial regarding the role of the physical sublayers of Ethernet displayed on the following image. Just to mention an example for that: the…
francesco
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