Newest Questions
16,963 questions
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Can ARP cache expiry can make a device lose 100% of its traffic for 1-2 minutes if its all UDP? [closed]
Let’s say the router sends an ARP request, but shortly after, the device changes its IP address. The router will have an outdated ARP cache for a certain period (60 seconds on Linux, or 2 minutes on ...
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5
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Why does my PC cannot connect to my network over switch? [closed]
I have a modem/router provided by my ISP, to which I connect a home type switch. To this switch, I connect my VOIP phone (which connects successfully to the network), a NAS (again, connects ...
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39
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IKEv2 Issues between Meraki and OPNSense
I have a meraki VPN mesh which consists of 3 meraki firewalls and 1 OPNSense firewall. There are 3 IKEv2 IPsec connections setup on the OPNSense firewall, one for each meraki. They're all configured ...
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6
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How to Handle TLS Certificates for Offline Systems with Unknown IP Address? [closed]
I’m a Software Engineer who’s recently been pushed into a Network Engineering role for my current project, and I’d like some advice on how I could have approached a particular issue more effectively.
...
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39
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Data link layer and transport layer differences/relationships
Hi I am a network engineering beginner learning about the TCP/IP stack in the context of using web services on an embedded system (processor connected to LTE cellular module).
I am struggling to ...
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1
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31
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Connect-Info(77) from Fortigate to Windows NPS
I have a FortiGate and I can connect it to Windows NPS radius, and the simple user test works (under User&Auth>>Radius Servers ...).
I then proceed to setup admin logins to the FortiGate, ...
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10
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How to proceed with a 4g proxy farm [closed]
I ended up buying these parts:
x1 Lenovo M710q - i5 7th gen, 16gb ram, 256 ssd (Probably didn't need this much, but I got a great deal so why not)
x1 Sipolar A-805P 20 Ports 2.0 USB HUB
x3 MS2372-153 (...
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Server receives IP from DHCP-server but can not ping gateway [closed]
Summary:
When connecting a HP Proliant Microserver gen8 server running a fresh install of Linux Mint 22.1, using a ethernet cable previously used by a HP laptop with proven internet connectivity, it ...
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11
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Bridging two networks over the internet [closed]
I'm moving my homelab into a datacenter. Yay! I've moved all the important stuff onto a Proxmox server running in my house, and I've shipped a second Proxmox server off to the datacenter. My plan is ...
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23
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Laptop connected to lightweight access point via WLC to access specific VLAN 10 [closed]
This is my network topology and the problem is with L2 which is succesfully connected to LAP which acquires ip address via DHCP from WLC's DHCP pool for management.
L2 cannot manage to acquire ip ...
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1
answer
80
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Pfsense router NAT Redirection not working [closed]
I have a pfSense Router protecting numerous things within my network. However, a few of those things, such as my Ark Server, need to be accessible from inside my network but it doesn't work. It worked ...
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1
answer
36
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Longest Prefix match with entries greater than my IP
I am currently facing a problem and can't get a definitive answer to how the router will decide the correct interface to forward my packet to.
Given that an IP datagram has destination address of 192....
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51
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juniper qfx10k sflow
I have a QFX10002-36Q, and I configured sFlow with the following commands:
set protocols sflow polling-interval 20
set protocols sflow sample-rate ingress 10000
set protocols sflow source-ip 10.x.x....
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1
answer
37
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Dell Switch OS does not allow any interface commands
I have recently been tasked to operate a Dell switch and I have to shut down an interface connected to a server.
But the switch OS that it has doesn't allow me to enable/disable the switch ports.
SW1(...
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53
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Can you multiplex 5+ ethernet lines such that one of those is selected mechanically or by detection of a signal on that line?
Hi all I'm a relatively new electrical engineer who's been asked to take 5 Cat 5 data lines and feed them to a hub which selects one of them upon receiving data in that line to send to a computer. As ...
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1
answer
102
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QFX10002 and storm default behaviour
I have a pair of QFX10002-36Q switches, and I want to disable or rate-limit multicast and broadcast traffic to a low value. When I try to configure a storm-control profile using set forwarding-options ...
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26
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cisco snmp OID for l2vpn bgp evpn
how do I find the oid for cisco from l2vpn evpn BGP prefix?
below is an example of snmpwalk output using standard mibs bgp4, and only 3 out of 5 show ip prefixes there.
enter image description here
$ ...
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1
answer
33
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Roaming with versus without the same Mobility groups
I am studying Roaming for my ENCOR exam.
My question is, how exactly does roaming differ if we have an inter-controller roaming scenario where the WLCs are in the same mobility group versus a scenario ...
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vote
1
answer
92
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Getting “Network unreachable” in FortiClient 7.0.16 [closed]
I am facing difficulties connecting FortiClient 7.0.16 to the corporate VPN while I am in Colombia.
When I try to connect, I receive the error message “Network unreachable.” I have tested it on ...
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2
votes
1
answer
154
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Dual ISP with default route setup
This is how my topo will look end of the day.
eBGP peer between Edge <---> ISP
eBGP peer between Edge <---> Border-Leaf (I am using 65355 to peer eBGP with Edge )
Inside EVPN/VXLAN ...
- 4,431
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19
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Design question to fetch L2 traffic with sFlow
I need some advice about L2 traffic fetching.
Here's the situation :
I got 2 datacenters where both core switch (Cisco Nexus9000 C93240) are linked each other through a 1GB/s vPC where our VLANs are ...
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3
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1
answer
204
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Redundant router-switch connection
I have the following network:
Gateway1 is a dedicated server with Juniper vSRX VM, Switch1 is Juniper QFX5xxx. There are multiple VLANs set up on the servers, so interface mode on the switch is set ...
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1
answer
40
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multi-connectivity and splitting of traffic flows
In a 5G or SAGIN-based system, is it feasible for a multi-connectivity-enabled user equipment (UE) to split its traffic and transmit it concurrently over both terrestrial and non-terrestrial networks? ...
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vote
1
answer
51
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When a layer 3 switch or a switch with SVI receives a broadcast frame, does the switch decapsulate the frame?
When a layer 3 switch or a switch with SVI receives a broadcast frame, does the switch decapsulate the frame? I was confused on this. I was playing with packet tracer trying to get a better ...
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28
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how to convert two routed interfaces between two pair 9k and pair 7k to vPC
We have pairs of N7K and N9k connecting via eigrp (full mesh), each one of the pair connected to two mpls routers, each pair have routing table, I am looking to replace the routed interfaces between ...
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17
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Sflow on Nexus returning faulty interface values
Hello fellow networking folks,
I'm currently trying to build a small monitoring solution for multicasts. In our lab we have a Nexus9000 C93108TC-EX running version 7.0. I want to start with this ...
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2
answers
39
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I can't get the correct answer from the Cisco IE-3300-8T2S 17.9.5c
I send a request to Cisco 3300 via MIB Browser. Request for the state of the external alarm contact. 1.3.6.1.4.1.9.9.138.2.0.1 (ceAlarmAsserted). In response, the switch sends Value (NoSuchObject): (...
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2
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363
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Correct idea for an IPsec gateway
The purpose of this question is to improve my ability to technically apply the idea of routing specific traffic through an IPsec tunnel before reaching the Internet.
So far the best that I can ...
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Nested Fragmentation [duplicate]
If fragmentation only occurs once I can reassemble the package, what if the package is fragmented more than once
For example, a package of 3000 bytes will be sent via an Ethernet MTU link of 1500 ...
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1
answer
96
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vPC not getting configured on Nexus switches even though the config status is green
I have the following status on my Nexus switches regarding the vPC configuration status and I see the number of vPCs configured as zero.
Legend:
(*) - local vPC is down, forwarding via ...
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