Networking Protocols

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Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.

I am configuring port forwarding on my router.
For ex if i want to telnet to my device on 23 or access by device using https I want to map these ports to other ports which can help in the port forwarding.
Would like to know what are the recommended ports which can be used for the port forwarding......
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Got confused about using VxLAN (The new Dataplane overlay) or just use MPLS over GRE. I need to visualize  network for multiple tenants.

Also any experience in Juniper contrail integration with Mirantis Openstack Havana

Your express your views
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Dear experts,

I am currently using a VigorFly router where my Internet connection is connected through PPoE.

However, currently the signal is very weak, I went and got a linksys router.

When I connect the LAN 1 port on the VigorFly to my linksys Internet port, then connect to the linksys wifi, I was not able to get online.

Please find the current settings below:

VirgorFly:
virgofly router setup
Linksys:
linksys router setup
Please help verify the settings, if incorrect, please help advise what should be change.

I'm not sure how DHCP network works, which router should have DHCP enabled.

Many thanks.
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I wish to apply a display filter to a Wireshark capture that contains several ARP exchanges when no filter is applied.
I have tried three different filters (one at a time) as follows:
 ip.proto == ARP
 ip.proto == 0x0806
 ip.proto == 2054
 but in either case, when the filter is applied there are no packets shown.

What filter should I be applying ?

I am using Version 1.6.5 (SVN Rev 40429 from /trunk-1.6)
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The clock on the DC at one of our locations is fast by 5 minutes.  When I change it and hit Apply, it changes to the new time and then immediately changes back to the previous time.

What would cause this?

How do I fix it?
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I'm looking for some recommendations on a redesign of our existing network. We are moving to a top of rack architecture but I'm struggling with the best way to design this new network architecture. At the moment I'm mainly concerned about inter-connectivity between all of my 3750Gs - as you can see below I have 3 separate stacks. The TOR1 and TOR2 stacks are each in their own rack. IT1 is my existing core. The TOR equipment is not yet operational and at this moment is just up and running in a testing capacity.

Given that my question is what's the best way to set this up? Currently the red lines are all connected as trunk ports with spanning tree taking care of looping issues. However I'm starting to wonder if using Etherchannel or LACP would not be the better way to go here. We are a VMWare ESXi 5.x and Equal Logic shop so with that in mind most of the server traffic will be between TOR1 and TOR2 with the majority of traffic in TOR2. My original plan was to use spanning-tree and build duplicate links between the two stacks and setup costing so that the traffic would go from TOR1 to TOR2 and then off to IT1 if it needed to get back to the main stack. Of course with that you take a bit of a  hit if there are any issues and I'm thinking Etherchannel or LACP would be a way around that and perhaps just a better solution all around. So again looking for input as to what would be the best/ideal way of setting this up given the hardware I've noted above. I'm not sure what …
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Can someone shed some light on how to set up VPN Access with Certificate Authentication? ASA 5505 8.2 with AnyConnect Essentials License and Mobile License.
1
Our client application works fine on Windows XP.
The application scans approx 10 registers without failures at a scan rate of 100 milli secs.
When used on Windows 7 the app works for a few seconds and is then unusable.
If the scan rate is decreased to 10 seconds the app works without failures
If a scan rate of 2.5 seconds is used some failures are noticed.

The link http://modbus.control.com/thread/1341225864 refers to many similar issues.
However a fix suggested below did not work.
netsh interface tcp set global autotuninglevel=disabled

Please advise.

Help moderator please... I would like to increase the points 1000 but "Edit question" doesn't allow ??
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Is my understanding correct?

ARP is a table of devices which are currently connected on the network.

So when a new network is setup the router or managed switch stores the ip addresses and MAC addresses in a table. The table is created when a single device sends out an ARP request (i.e. broadcast) to check if a device is on the network using a MAC address.

thats the first thing.

second thing is if we flush the ARP - does that mean we reset the ARP cache which would result in the devices losing connectivity temporarily?

please advise in both scenarios.
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Hi All,

I have an existing PRI connecting to our Nortel Networks Call Center.  I recently had to incorporate a Tandberg 880 on my network which is asking for an ISDN/BRI setup.  Is there a way to configure 2 channels from my existing PRI to the Tandberg?  BRIs are no longer available and an addition PRI is overkill.  Or, is there another way to simulate this ISDN/BRI connection?

Thanks so much!
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Hello,

Had a user's machine that lost it's network connectivity.   The network icon is 'x'd out.  When I run ipconfig, there are no results.  

I tried the following:

Remove the NIC from Device Manager and reinstalled driver.

Netsh winsock reset
netsh ip int reset

Ran ComboFix malware check

Took her drive and put it in another machine.  Same result - so I'm pretty sure it's the OS, not the hardware.

Tried to add another NIC.

Added a static IP.

Ran sfc /scannow

At a loss.  Thanks for your assistance.
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Hi,

I am in the middle of configuring two factor solution and working with the network team.  The network team is suggesting that we should use public IP for Cisco VPN clients and route them in internal network, Windows & Linux.?

Is this a good idea?

Thanks.
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What is vpn concentrator? What device i need for this?
does vpn terminate on this device ?
to provide access to internal devices do i need to make changes to my firewall considering i have this device on my dmz?
how many users or vpn connections it can take?
can i provide dhcp on this device?
can we provide ssl vpn using this device?
0
Hello,

I have Filezilla server installed on our server. I want to require secure connections, so I want to setup FTPES.

It asks for certificate details. Do I need to purchase something like a SSL certificate?

I created one via the Filezilla interface, but when I try to connect my client tells me that I might not want to trust it.
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i have set up a asa5545 for sslvpn access. I can log in ok and get an ip address from the pool i have created. however i cannot ping any device connected to the inside network. nor can i ping the client from the asa device. i have monitored the asa device through adsm and connot see any traffic coming from the pc connected to the vpn. I have seen this issue before on a cisco 2900 where i had to trash the vpn config and start again but i do not want to do that on the asa as it is in production.
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I have a network small network that I am trying to troubleshoot for streaming issues. Normally webserver is fine but when you stream a movie it is buffering and choppy. is there a tool to see if it is provider or computer?


thanks
0
Hello folks,
    I have a eBGP linux box (using quagga) and I experience the following issue:
traffic to/from external network  x.y.z.0/24  is slow through one of the two BGP peers that I have (call it B1), and which seems to be the default in x.y.z's network route table.
    No problem I said, I will push a route rule "by hand", so that traffic with said class should be handled by my other bgp peer (B2). However, the problem persists, because even though I send packets to x.y.z.0/24 using B2 , the response comes through B1, thus laggy.
    Putting peer B1 in shutdown will force x.y.z. network to talk to me through B2 and all is fine, but this is obviously no solution.
    Any ideas?
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Hey Experts,
So i am struggling with this and it it is most likely due to my lack of knowledge of the subject.
I have wrote in the past a mini script that pulled values from snmp on printers with page counts, OID value that i needed was easy to find just by searching for the current count.  Not that easy on the WG since bandwidth is constantly going up and down.
I am trying to modify my script to pull bandwidth values from a watchguard.  Upload and Download bandwidth speeds on a WAN interface. I've done a smnpwalk and have a list a mile long of values and data but unsure which ones pertain to interface speeds....

I've been unable to locate online a list of the specific values online.  Does such a list exist?  Does anyone know how to pick apart the list from snmpwalk to get what i am looking for?

I have attached the snmpwalk if anyone cares to take a look.

Thanks
LIST.TXT
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We have a Cisco Catalyst switch with the attached config.  We have two VLANs 2 (Voice), 3 (Data).  The phone system is on FE 2/2 which is handing out DHCP for VLAN 2. Is there any reason with this config that if we plug a phone in to almost any other switch port that it would not get DHCP from the phone system on FE 2/2?  Does the Voice command only work for Cisco Phones?  We are trying to use Mitel phones on this setup.  

Current configuration : 9450 bytes
!
! Last configuration change at 13:54:40 EST Mon Oct 7 2013
! NVRAM config last updated at 13:56:53 EST Mon Oct 7 2013
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
service compress-config
!
hostname XXXX
!
boot-start-marker
boot system flash bootflash:cat4500-entservices-mz.122-54.SG.bin
boot-end-marker
!
enable password !!!!!!!
!
!
!
no aaa new-model
clock timezone EST -4
ip subnet-zero
no ip domain-lookup
ip name-server 208.67.222.222
ip vrf mgmtVrf
!
!
!
vtp domain Agency
vtp mode transparent
!
!
network-policy profile 1
 voice vlan 2
 voice-signaling vlan 2
!
power redundancy-mode redundant
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
vlan 2
 name Voice
!
vlan 3
 name Network
lldp run
!
!
!
interface FastEthernet1
 ip vrf forwarding mgmtVrf
 no ip address
 speed auto
 duplex auto
!
interface GigabitEthernet1/1
!
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Hi,

I wanted to know if there is a possibility that the alerts for an application which is monitored by netcool could be suppressed during activities like change, upgrades etc?

How can we supress them/How to schedule downtime for perticular server in netcool?

I basically need a dynamic (not scheduled maintenance) way for my NOC Operators to go to a website or GUI, input a list of nodes that need to be suppressed for x amount of
time.  Once they put that list in, it should suppress all events from
those nodes until they either "flip a switch" or the time expires.

Can you please advise?

Thanks in advance

Rtantra
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I would like a bit of guidance for my current senario, to find the most efficient setup for managebility.

Site A (HQ - alternate route to data center))
Site B (Datacenter where phone infrastructure is located)
Sites 1-66 (remote offices)

Currently there are sites 1 through 66 have two site to site vpns set up. One to Site A and one to Site B. Site A also has a site to site vpn set up to Site B

We will be rolling out shoretel phones to the remote sites 1-66

All remote site phones need to talk to eachother as well and id rather not have to mesh all sites to all sites at each remote site.

Id like to be able to use qos and BWM to prioritize phone traffic.

Anyone with sonicwall and shoretel phone experience have another way for me to configure this senario without having to add 66 address objects to a group at each location? Would route based vpns solve this? and if so how would they be configured at the remote sites? am I going to have 66 new tunnel interfaces on the data center firewall?

Thank you in advance
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Hello,
I have Cacti setup to monitor devices in our company.  I want to know how to set up Cacti to receive snmp trap from those devices.  I read there is a plugin CAMM that works with Cacti, but I can't find much information to make that to work.  I appreciate any information.
Thanks
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At our corporate office we currently have a 60Mb connection to the internet through Time Warner.  For redundancy we are adding an additional 50MB connection through AT&T.

We have another location that is co-located in our parent companies datacenter. They already have multiple providers and currently use BGP.

Questions.
If I get a /24 block of IPs from ARIN is it possible for me to split that block up and BGP advertise a portion through Time Warner here at my corporate office and get a provider at my parent company to advertise the other portion.

What I want to get to is the ability to failover from my corporate office to the parent company and if need be from the parent company to the corporate office.
Ideally I would take the /24 I hope to get from ARIN and split it in half. Advertise half here at corp and the other half at the parent company datacenter.


Very new to BGP. Any advise would be greatly appreciated.
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folks,
could you please advise, minimum server specs to install SW-CUP8.6-K9 for lab purpose .

Regards,

Aaron
0
Hi,

Need to use AD to define which users can gain access via the remote Access VPN client. Users are using the IPsec VPN client to gain access to the network and the ASA has a radius server configured pointing to the DC, which also has the NPS role Installed. I would like to use a specific group in AD to filter who has access.
Can someone guide me on how this can be achieved as I have tried creating separate connections request policy and network policy with one specific AD group defined, but it doesnt work.

There is already one (looks like default) connection request policy called Use Windows Authentication for all users.

I have read that I can set up the same server as LDAP server on the ASA and use the ASA to query AD somehow but wanted to ask if someone can help without doing this as will be so much easier.
0

Networking Protocols

12K

Solutions

16K

Contributors

Networking software modules are interfaced with a framework implemented on the machine's operating system that implements the networking functionality of the operating system. The best known frameworks are the TCP/IP model and the OSI model. Systems typically do not use a single protocol to handle a transmission. Instead they use a set of cooperating protocols, sometimes called a protocol family or protocol suite.[9] Some of the best known protocol suites include: IPX/SPX, X.25, AX.25, AppleTalk and TCP/IP. Other protocols indirectly related to networking include the hypertext transfer protocol (HTTP) and its related technologies, Dynamic Host Configuration Protocol (DHCP), Domain Name Server (DNS) and other Internet protocols.