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37 views

How is port 80 associated with application port?

I'm new to networking, just a question on port numbers. We know that port 80 is for HTTP. But if I want to access a web application whose web server handles http requests, normally I type below url ...
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votes
1answer
18 views

When IP header of length 22bytes is there then how padding will work?

My base IPv4 header of 20bytes + 2bytes i used for Options making it 22bytes means 176bits so padding will add 16 Zeroes to make it multiple of 32? is this correct way to understand? Boundary of ...
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1answer
27 views

Functionality differences between an Wireless Access Point and a Switch?

I have a WAP connected to a switch via a twisted pair cable. Aside from the communication medium to other nodes (electrical signal vs radio waves), do they operate the same way? Specifically: When ...
-1
votes
1answer
23 views

Patch Panel/Wiring Question

The reason I am asking this is because I am an amateur, so if it is obvious to you, it's not to me, so please explain. I saw this picture and I panicked a little bit, First of all I know older patch ...
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2answers
60 views

what is difference between MSS and Window Size?

What is actual difference b/w these two? 1) I have gone through many tutorials on Youtube where some have told that Window Size is what total packet size it can receive eg Window Size is 15000 bytes ...
2
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0answers
22 views

First fresnel zone and Epstein-Peterson approach

Let's say we have the following wireless communication system with obstacles located as drawn in this picture Solving this using Bullington method is straight-forward, only obstacles that fall into ...
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1answer
20 views

Question On Route Aggregation [duplicate]

Suppose I have these 3 IP Prefixes : 190.154.27.0/26 190.154.27.64/26 190.154.27.192/26 and I want find the aggregate prefix. I convert each address to its' binary equivalent: 10111110....
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votes
1answer
9 views

Parameter Map vs IP SLA

What is the difference between parameter map and ip sla? In both we can specify that if threshold of something is crossed then a log is generated and based on that some action can be taken. Has one ...
0
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0answers
15 views

Off topic questions: Stack recommendation [migrated]

I recently asked a basic networking question that could be considered as off topic for this stack. Fair enough, I get that you're trying to run something that is more tailored to professionals here. ...
1
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2answers
24 views

problems routing WAN with private IPs and LAN with public IPs

I have just installed pfsense 2.4 for a SOHO I work and I'm getting problems with the routing. I have asked my ISP for a /29 network with public ips for the DMZ, but instead of giving my directly what ...
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0answers
23 views

Possible to change VTY password 7 to secret 9

The version I have Router1#sh ver Cisco IOS XE Software, Version 16.09.02 . Router1#sh run | sec vty line vty 0 4 password 7 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX login authentication ...
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0answers
65 views

Why is a packet is not sent until ACK is received when window size is sufficient [migrated]

The considered application (server) has a number of clients connected. It processes each message from the client and sends two output messages. The output messages are generated sequencially and ...
0
votes
1answer
16 views

HP 5800 interface card/module installation

Is it possible to install an interface card, in this case LSW1GP16P0 to a HP 5800(JC103A) without powering off the switch? The installation guide is not very clear on that point.
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2answers
71 views

What happens to undetected Ethernet errors?

The checksum used in Ethernet packets cannot 100% detect errors. If that is the case, how can I ensure that some file I have transferred from one computer to another is uncorrupted? Thanks
0
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2answers
61 views

How does a router route traffic on a LAN, in detail?

Electrical engineer here trying to understand things. So I guess this might be simple or very complex, but how exactly does a router route traffic between say 2 PCs that are on a LAN? eg. PC-1 and PC-...
1
vote
2answers
56 views

Different Wi-Fi security levels under same private subnet

I'm working on an assignment and I'm given a hypothetical scenario where: A company has a local subnet where everything shares the flat address space 192.168.0.0/8 (this means that any device can ...
2
votes
1answer
63 views

Is TR-069 a security risk?

My ISP provides a combo box (ONT + router + switch + Wi-Fi) which they can manage remotely, likely using TR-069. They automatically push default configurations to the device. After I do a factory ...
0
votes
1answer
21 views

implementing and restrcting broadcast traffic

Can we restrict the high broadcast traffic from interface in Cisco ASR9k and 7600 routers? If so, what configuration we should apply?
0
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0answers
29 views

Which Ethernet Ring Protection Switching (ERPS) feature makes it so faster than RSTP/MSTP?

I want to know what makes it possible for ERPS to converge under 50 ms? it's a hardware-specific feature that provides this fast convergence or it is about the much more efficient algorithm? I read ...
0
votes
1answer
26 views

Brocade/Ruckus per vlan spanning tree vs Cisco

Brocade = (config-vlan-10)#spanning-tree rstp This seems to enable rstp per vlan. This example enabling it on vlan 10. Cisco = spanning-tree mode rapid-pvst This enables Rapid PVST+ under the covers ...
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0answers
31 views

How to change a usernames password to secret without deleting username

Router1(config)#username admin privilege 15 algorithm-type scrypt secret xxxxxxxxxxxxxx ERROR: Can not have both a user password and a user secret. Please choose one or the other. Router1(config)# I ...
0
votes
2answers
28 views

SFP/SFP+: Extender? F/F panel passthrough?

My primary question is this: Is it possible to have a simple passive SFP/SFP+ bulkhead passthrough connector, with two female SFP/SFP+ sockets facing opposite directions and wired directly together, ...
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0answers
8 views

RTO timer in EIGRP

Does EIGRP function like this - A packet is sent and the sender waits for acknowledgement. If it gets an acknowledgment, then it updates SRTT timer along with Sequence Number. If it doesn’t get any ...
0
votes
1answer
31 views

Routing between 2 VLANs with one HP Switch

I need help with VLAN: I have a WiFi AP with the IP 192.168.100.190. There are 2 SSIDs with VLAN 1 and 2 created. As a router I have a Sophos UTM with the IP 192.168.100.199. Furthermore, I have an ...
1
vote
2answers
41 views

SRX to ASA IPSec troubles

we built a VPN between partner's Cisco ASA (unknown version) and my Juniper SRX 340. The tunnel seems to go up properly: root@fw01> show security ike security-associations node0: ----------------...
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0answers
18 views

Adding legacy AP firmware to new WLC

At work I've stumbled into this task where I needed to update our virtual WLC from 8.1.133 to 8.10.2.2. However in addition to new APs (9120) there are still APs (2702) in use that are not supported ...
0
votes
1answer
23 views

Cisco qos, service-policy on output interface on 1100 ISR seems ignored

I am trying to configure QoS for a specialty purpose application, and it is the first time I have done QoS. This is on an 1100 ISR with IOS XE 16.09.03. The device is a set of 4 that establish a mesh ...
0
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1answer
21 views

Strict source routing using my own scattered PCs/ routers

I would like to completely control my network transportation by defining the packages path. According to this I can't do it unless I have control over all the PCs/ routers in its way. Suppose, I can ...
0
votes
3answers
56 views

Difference between Port (all VLANs allowed) and Trunk

I have a very basic background on networking Cisco (2960 switch), and realize that Fortiswitch 224E has the option to allow many VLANs in a port: On the other hand, is the trunk (which I assume is ...
0
votes
1answer
28 views

Nexus 6001 How to find source of STM_LEARNING_OVERLOAD

Several time ago I've foud that NX-OS sends STM_LEARNING_OVERLOAD EET: %FWM-4-STM_LEARNING_OVERLOAD: system experiencing unusual number of new address notifications - deferring learn notification for ...
0
votes
1answer
19 views

Why do we need EIGRP AS numbers when we have EIGRP RID?

I understand that the EIGRP routers need to have the same AS number to peer with each other. But why can't we just use EIGRP Router ID?
0
votes
1answer
33 views

vpc/mlag block half of uplink?

We want to configure 2 Arista switches by mlag and connect 1 port channeled switch to both of arista's. so in this case, if one of our arista fail the other one will respond. now my question here is ...
0
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0answers
12 views

Cisco 7960 CTL File Encoding

When booting my 7960 phone, I am getting all of the correct files. However, in trust list (CTL File), the IP addresses are incorrect. They are the ASCII characters of the actual IP address. Therefore, ...
0
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1answer
22 views

SFP LC to LC path code recommendation [closed]

I need to connect to Ubiquiti (router > Switch) using SFP. I believe I need a Ubiquiti Networks UF-SM-1G-S transmitter (BiDi). the cable will be around 40M long and crossing the house, underneath ...
1
vote
1answer
46 views

How does a DNS response reach a client behind a NAT?

How does a DNS response reach a client behind a NAT? I'm talking about DNS queries using UDP for transport with a server that is not in the same network as the client. Does the NAT correlate the ...
0
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4answers
36 views

ACL on routers to block TCP/UDP ports

How routers understand the layer 4 port numbers to be blocked in ACL? When an ACL to block TCP/UDP traffic with certain port numbers is applied on a router/L3 interface , how will router understand ...
0
votes
1answer
95 views

How to Run Static IP Through Comcast Business Class Modem to Router?

I apologize in advance for this kind of nebulous question, but I'm very stuck after many hours of trying and I need help. Here's what I have: Newest model of the Comcast Business Class Modem/Router ...
0
votes
1answer
19 views

Connect 2 VLANs on Cisco SG300 with cable

I have a Cisco SG300 with 2 VLANs enabled, half the switch ports are on one VLAN, half is on the other. Both VLANs use the same subnet. I want traffic to travel between the 2 VLANs. I thought the 2 ...
0
votes
0answers
12 views

Sonicwall - WLAN not connecting to Amazon VPC over established LAN VPN

VPN Tunnel Interface up and running for 10.80.40.0/24 (X0) subnet. WLAN subnet 10.57.15.0/24 (X0:V100) unable to ping 10.233.X.X on the VPC through established VPN. I have checked the event log and ...
0
votes
2answers
35 views

How to advertise a classless network in RIPv2?

In OSPF and EIGRP we can advertise specific networks only using wildcard masks. For example, if a router has networks 10.0.10.0/24 and 10.0.20.0/24, we can choose to advertise only 10.0.10.0/24 by ...
1
vote
0answers
37 views

Why can I ping 10.10.10.140 from 192.168.1.15? [closed]

I'm on a 192.168.1.0/24 subnet, and when I ping 192.168.1.137 I get a response saying the host is unavailable (as expected because I don't have any machines using that address) However, when I ping ...
-1
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0answers
24 views

Use remote gateway's cellular internet as “WiFi-esque” access point?

We have IIoT gateways in remote locations, with high-gain 4-foot antennas for cellular internet, but no WiFi antennas/add-ons. Question is, when we're on-site with only a laptop (and no mobile ...
1
vote
1answer
27 views

Cisco ASA looping broadcast packet

I have small office where running cisco ASA ASA5506 and version 9.4(1) and it's also configured for IPsec VPN tunnel, My LAN subnet is 10.1.1.0/24 So i have found very interesting things in LAN ...
1
vote
1answer
39 views

Can different VLANs have same subnet? [duplicate]

When talking about VLANs I often see examples like this: VLAN 10 - 10.0.10.0/24 VLAN 20 - 10.0.20.0/24 Different subnets yet different VLANs. I understand this is a must if we want communication ...
0
votes
1answer
21 views

Is Hub the DMZ in a Spoke-Hub architecture?

In a spoke hub architecture, is the DMZ another spoke (I.e. peered to the hub), a stand-alone vent, or the hub itself (for example as a subnet)? This question is mostly for azure implementation.
1
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2answers
63 views

Ansible doesn't return valid information

I am new in Ansible and wondering why I am getting invalid results. Here is the short script which should return an inventory informations like SN, model, SW version and name. --- - name: Cisco ...
0
votes
1answer
33 views

Both static and dynamic routing in a router?

I've been reading about static and dynamic routing and can't help but wondering if it's possible to have both static and dynamic routing in a router? Would it cause a conflict if we have both types ...
0
votes
1answer
38 views

how to factory reset ASR 1001-X

So I was setting up/testing this router. While using auto-secure during the auto-configuration. {Router#setup...} Once I get through auto setup and reloaded. I was not able to login. I did some ...
0
votes
1answer
27 views

N2K-C2248TP-1GE question

We are working with Cisco 2960 and Cisco 4948 switches as our top of rack switches and we want to purchase some N2K-C2248TP-1GE , and connect N2K-C2248TP-1GE to our edge switches, (our edge switches ...
0
votes
0answers
14 views

MLAG with VRRP on ASR1K-HX

I have two ASRs connected to each other and configured Multichassis LACP. LAG from an external switch to each ASRs. I am looking for a solution on how to enable VRRP into the ASRs since I do not have ...

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