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15 views

DSL internet connection [closed]

Sorry if this is the wrong spot or the question has been asked before, please redirect me then. I recently moved from Romania to Germany and the internet connection here is via DSL, which I'm not ...
0
votes
1answer
42 views

ARP source address behind a switch

I have an ECU sending ARP request to another ECU destination and it's working fine. the problem arises when I use an automotive switch in between. the source IP address is 192.168.0.12 the switch ...
0
votes
1answer
34 views

Avoid bottleneck in UDP multicast

The question is that a server is serving a multicast group with UDP. Lets say that its a file server and it will be serving big files (~10GB). Now we have a multicast group with multiple clients. Some ...
0
votes
1answer
17 views

How can I configure the “DHCP Addr. Assignment” Required on a Cisco WLC 2504 from the CLI?

How can I set the "DHCP Addr. Assignment" checkbox on the WLAN Advanced tab on the Cisco 2504 WLC from the CLI? I think I found something, but it gives me an error and does not set the checkbox: (...
0
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0answers
10 views

Point Subdomain at external domain- CNAME [closed]

I would like to point a subdomain to be displayed in another external domain using CNAME flattening. e.g. blog.testdomain.com to be displayed at newdomain.com In testdomain.com DNS, I have created ...
0
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2answers
35 views

DHCP on CISCO 3850

I would like to configure the DHCP server on CISCO 3850, and reserve around 100 static IP for servers After doing research found that I need to create individual pool for each static maping like ...
6
votes
3answers
1k views

Sending less data than the TCP buffer could take

The accepted answer of this question explains: When you send data, your TCP buffers it. So if you send a character it won't send it immediately but wait to see if you've got more. But what if I ...
0
votes
0answers
18 views

pfsense in multi-WAN: OpenVPN route all traffic through VPN, how to set the gateway?

I have an OpenVPN running on pfSense in a CARP with multi-WAN. OpenVPN listens on all incomming (0.0.0.0) so that I can enter throu what ever WAN is active right now should one go down. When I ...
0
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1answer
52 views

What happens when a switch receives a packet with an unknown source MAC address?

The CAM table cannot be populated with the source address so other action must be taken. Is the switch going to drop the packet?
1
vote
0answers
21 views

NX-OS switchportort meta tags

I believe i once stumbled across an NX-OS feature which we currently need, but for the sake of it, i can't remember the details like platform (100V, 5000, 7000) or version. We are currently using 5600'...
0
votes
1answer
22 views

Function of Pass through port on Access Point?

I have an Alcatel Access Point 1201H which has got 1 uplink gigabit port while 3 downlink ports. Also there are two ports named "PT" which mean pass through ports. I want to know what is this port ...
0
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0answers
31 views

Why my ae interface Link type is down but the physical interface is up?

Why my ae interface Link type is down but the physical interface is up? In my convergence layer Switch, I use two Juniper EX4300 devices realize the Stack: so there have xe-0/0/x and xe-1/0/x ...
0
votes
1answer
41 views

How to set vlan QoS priority for voip (on cisco 2960)?

I have assigned all voip-related ports to one vlan. I want to set up the QoS priority for that vlan. Which commands can help and in which mode? I have assigned all required ports to one vlan. I tries ...
1
vote
1answer
43 views

What is a meaning of Load balancing Hash

What does Load balancing Hash mean in CEF? Which commands are use to configure? Is it support to other vendors except Cisco? If it is not support other vendors? do they have any similar concept? Which ...
0
votes
1answer
21 views

What are the Rx Mini and Rx Jumbo rings? [closed]

Reading through the ethtool man page, I found the following: -G --set-ring Changes the rx/tx ring parameters of the specified network device. rx N Changes the number of ring ...
0
votes
0answers
36 views

Is there a way to see client roaming activity on a Cisco 2504 wireless LAN controller?

Does the Cisco WLC have sufficient logging to keep track of clients that do fast roaming (e.g. 802.11r, 802.11k, 802.11v, 802.11w) between access points on the same WLC? I want to see that clients are ...
3
votes
1answer
103 views

Switching interface VLAN ID Mid-Production

I was wondering if there was a way to switch out the VLAN ID from VLAN1 to VLAN10 without impacting the connectivity of the end users? Can I simply copy and paste from one interface VLAN to another? ...
1
vote
1answer
26 views

Origin of Cone in NAT naming convention

I am reading about Full Cone, Restricted Cone and Port Restricted Cone NATs. While how they work is clear, I am having trouble coming up with a justification for such naming. The "Cone" probably has ...
0
votes
0answers
22 views

Does resetting system config of a 2504 WLC change licensing?

I purchased a used Cisco WLC 2504 with a screenshot that says "10 Access Points Supported". I did a system reset on the unit because I didn't know the password. Now, after I login to the web UI, the ...
0
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0answers
15 views

Which address are used in fcp header?

I have a little question . The src address and the dst adress are fcid ? Tnx
0
votes
0answers
15 views

Connectivity between two building [closed]

we have 2 buildings D-24 ( old one ) and D-21 ( new one )And we have connected both buildings with Airtel P2P 1gig pipe on fiber . Devices at both end :- Cisco 6504 switch at D-24 end Cisco 4500 ...
0
votes
1answer
28 views

JUNIPER EX-2200-C Layer 3 Switch Configuration

I am setting up attempting to simulate a small infrastructure of Clients and Servers. Current Setup 1x. Dell Inspiron Tower Running ESXI 6.5 1x. HP Z800 Workstation Running ESXI 6.5 1x. Juniper ...
0
votes
1answer
36 views

Is it possible to differentiate cisco ports on monitoring system via snmp?

I am managing some cisco switches in my monitoring software (zabbix), and it provides useful insights that I would like to monitor: Warning on link up / down Warning when ports are on half duplex ...
1
vote
1answer
139 views

Cisco ASA 5506: The switching between the two providers by using Route-Map, creation backup channel

We have two providers. I want to make the second provider a backup channel. This configuration is most often offered: object network internal-pat-primary_obj nat (inside,outside1) dynamic interface ...
0
votes
1answer
57 views

Multicast in one VLAN

I need to receive multicast traffic over L2 segment on my client machine. But for some reason I am unable to do it. To my understanding with such scheme I should receive traffic if inbetween Juniper ...
0
votes
1answer
46 views

ARP after DHCP discover

Hey All, I was working on DHCP lab As seen in the below figure when I take a pcap between e2 and R1 [in a situation where i shutdown the f0/0 interface on R1 and startup again] I see an ARP ...
0
votes
1answer
23 views

Is Network Bridging secure [closed]

Bridging two network cars in Windows allows the two separate networks to connect. Assuming there are three NIC cards present in a machine: A, B and C. If I bridge NIC A and B, is there a possibility ...
-1
votes
2answers
50 views

why does not the Internet require a single routing protocol for all stand-alone systems?

why we are not using one routing protocol like OSPF for example for all autonumus systems.
0
votes
0answers
17 views

Juniper EX Switch sending TCP reset on SSH connection randomly

So as stated in Title I'm observing that one of our switch randomly send RESET flag in TCP and ends the ssh connection in the middle and sends and Window size of 0 as well. Randomly it refuses to ...
0
votes
0answers
45 views

Cisco Catalyst QoS queuing model

How Cisco Hardware queuing model (like 1p7q4t for Cat6800) are related to traffic classes (class-map) ? How assign the X traffic class to Y hardware queue ? Also, if only 6 classes are configured, ...
0
votes
2answers
37 views

Internet Entry Point

I am learning netwroking and would like to ask about how exactly we (as a casual user) get connected to internet and how a datacenter would do the same thing. i bet they dont use a regular modem which ...
0
votes
1answer
24 views

How to assign an ipv6 address to router 2900 gigabitethernet 0/0/0 - 0/0/3 interfaces?

I am working with a cisco router model 2900 which has four gigabitethernet 0/0/0 - 0/0/3. They do accept ipv4 addresses, however they will not accept ipv6 address. I have tried to use svi (assigning ...
0
votes
0answers
16 views

Sonicwall Site to Site VPN stops working when “Use this VPN Tunnel as default route for all Internet traffic”

I have two Sonicwall TZ300s that have a site-to-site VPN configuration successfully configured. I am trying to send all remote site VPN traffic to the WAN connection of the Central site. I have ...
0
votes
3answers
522 views

Why isn't 10.0.0.0/8 used instead of 192.168.0.0/16 for private addresses?

RFC 1918 “Address Allocation for Private Internets” (https://tools.ietf.org/html/rfc1918) specifies 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as private addresses suitable for unrestricted private ...
0
votes
0answers
16 views

Yealink T22p Quality Issue

We have around 7 Yealink T22p. Phone quality is good when only one phone is being used. If there are more than two phones are being used at the same time, one of them breaks up a lot but it breaks ...
0
votes
1answer
29 views

Cisco S190 WSA and Fortigate 200E Firewall in Network

One of my customer has Fortigate firewalls and cisco Iron port(WSA 190) they have very small User base may be around 300. But their both firewall (200E) and Cisco proxy Server are very powerful. I ...
0
votes
2answers
36 views

How fast DNS Propagation can practically be? [closed]

I've found via web search how info (i.e. DNS name-IP number pairing) is updated on authoritative DNS servers: https://www.freecodecamp.org/news/understanding-the-domain-name-servers-46c6bcf9afa3/. ...
1
vote
0answers
70 views

Cisco nexus STP loopguard

I have cisco nexus switches in vPC and they are connected to HP c7000 blade center switches and all my c7000 blade server has Linux Bridge is running, i believe something went wrong somewhere in Linux ...
1
vote
1answer
33 views

Does HTTP proxy sends its own TCP packets or bypasses clients packets?

Need help to understand what's happening on TCP level when http proxy is used. When client wants to open a website through a proxy, first connection is established between client and proxy. Then ...
0
votes
1answer
67 views

How to firewall choose routing through ospf?

enter image description here i have this case:on firewall 1 and firewall 2 configure routing ospf and vrrp in the same time traffic go to internet through firewall 1, from firewall 1 routing to ...
0
votes
3answers
80 views

Why can my ISP use 172.39.29.71 as local network IP? [closed]

I just check my IP routing? and it turns to be: IP:10.29.66.27 -> 172.39.29.71 -> x.x.x.x my outmost IP, which I get by Google "my ip". As far as I know, 172.16.0.0/12 is the one of the 3 private ...
-1
votes
3answers
48 views

Can u explain this representation of the IPv6 address 1001::1 64?

::1 is for loopback address. An IPv6 address contains 8 16-bit pieces. What do this representation 1001::1 64 mean (what is the full address with all 8 16-bit pieces)?
3
votes
2answers
56 views

Should portfast be configured on the physical interfaces or on the logical port-channel, or both?

I'm using a Cisco 3750 switch and have two physical ports configured in a port channel that connects to a router. Should I configure spanning-tree portfast on the physical interfaces or on the port-...
0
votes
1answer
31 views

Packet Tracer 7.2.1 does not support eigrp for ipv6

I'm trying to enable eigrp for ipv6 in packet tracer but is seems to only have ospf and rip for ipv6. Is this a recent limitation?
1
vote
4answers
100 views

How can I search for MAC addresses on local network without referencing any IP addresses [closed]

I think there is an IoT device on my network that has lost its IP address or IP address has been corrupted by a power surge. I want to scan MAC address to see if it is still 'hiding' on my network. I ...
3
votes
0answers
80 views

What is the real standard behind the “Rule of 6” for running network cabling next to power?

Something I picked up years ago at a previous employer is the "Rule of 6": When running data lines in parallel with power for a distance of at least six feet, the data should be at least six inches ...
0
votes
1answer
28 views

Which Cisco access points (and what IOS versions) does the AIR-CT2504 wireless LAN controller support?

I have two Cisco 1140 access points and two Cisco 1252AG access points. Can I use the Cisco AIR-CT2504 WLC to manage all of them? What versions of the LWAPP Cisco IOS are required? I tried looking for ...
0
votes
3answers
50 views

How can we troubleshoot Wifi problems apart from the basic tips?

We have a Zyxel Wifi with an NXC2500 and two WAC6503D-S access points in our office. Around 30 devices are connected. We have both a 2,4GHz and a 5GHz radio active, both on channels without known ...
2
votes
2answers
768 views

How do both sides know the MTU

If I have ComputerA that has their networking interface set with an MTU of 1500 and ComputerB has a network interface with an MTU of 1200 is there any way for ComputerA to know that ComputerB's MTU is ...
1
vote
2answers
16 views

How to remove voice-port directive from IOS Configuration

I'm running an old Cisco 1751-V for years now as ISDN-SIP-Gateway. Deutsche Telekom is getting rid of ISDN more and more and lately, ISDN-VoIP config is no longer necessary on my side. Since the ...

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