Network Engineering Stack Exchange
Network Engineering Stack Exchange

Most Popular

more tags
1500 questions
6
votes
1 answer

BGP, multipathing, and possibly OSPF

I'm setting up a second site for redundancy and DR. The goals are as follows: ISP fault-tolerance from either site: HostA, for example, can reach the internet in the event that ISP-A(primary) and ISP-B go down. Similarly, servers will continue to…
mwood
  • 395
  • 1
  • 2
  • 9
6
votes
1 answer

Cisco NX-OS 9K - LDAP Configuration

I'm having some trouble configuring LDAP authentication (via Windows AD) when connecting via ssh on our CISCO. I replaced some information from the switch, you will see it in uppercase here. Currently we only have one shared user, and the goal is to…
alcazaro
  • 63
  • 3
6
votes
2 answers

Can a single subnet work across several switches?

New to networking and studying hard but limited access to a kit to try things at the moment... My question is - if I had, for example, two Layer-2 switches cable connected, could I have devices on the same subnet e.g. 192.168.10.0/24, on either…
ICSOTSecurityEngineer
  • 63
  • 1
  • 6
6
votes
3 answers

Does NAT violate end to end argument?

Does NAT violate end to end argument? What does end to end argument means in this context?
Rumesh Madhusanka
  • 425
  • 5
  • 11
6
votes
3 answers

CIDR and VLSM what are the differences?

CIDR improves the allocation of IP addresses. VLSM allows to define a subnet as we wish. Can CIDR used without using VLSM?
Rumesh Madhusanka
  • 425
  • 5
  • 11
6
votes
3 answers

Is an ONT a modem?

I was helping a friend set up a simple home network after a move recently. He referred to his ONT as a modem, and I was tempted to say "well, actually, that's not a modem..." I didn't, because I realize that from a non-technical perspective, "modem"…
Cody
  • 163
  • 1
  • 4
6
votes
6 answers

packet routing between subnets on same vlan

I am trying to understand how packets are routed within the same VLAN. I understand that typically there should be a 1:1 mapping between VLANs and Subnets. However if i deploy the following configuration (shown in below figure), would the host…
dilbertsayz
  • 63
  • 1
  • 4
6
votes
2 answers

Juniper SRX240 Clustering - Policy out of sync

I have two Juniper SRX240's in a cluster. After re-ordering some security policies on the primary device and committing them ok I now can not make any other changes without the warning error: Policy is out of sync between RE and PFE…
Gareth Hastings
  • 860
  • 13
  • 30
6
votes
2 answers

Show connected (up) interfaces on cisco devices

Is there any way to show a total count of interfaces that are in status "up" on a cisco router? The purpose is to let a script go through all routers and show a summarization count of "up" interfaces.
Bulki
  • 2,363
  • 7
  • 25
  • 43
6
votes
2 answers

MPLS can reroute, but can it route?

I have 4 Cisco routers, connected one to another like the following: **R1**(s1/0)--(s1/0)**R2**(s1/1)--(s1/0)**R3**(s1/1)--(s1/0)**R4** All of them have an IP address assigned on their interfaces. There is a route between R1 and R2, and a route…
Vulpo
  • 243
  • 2
  • 5
6
votes
2 answers

Traffic from route-map to crypto-map

This is sort of an offshoot of my previous question Ipsec vpn, phase 2 unable to come up. The VPN is up and working but now I'm having an issue with getting the right traffic across it. The only thing I want to go across it is port 80 traffic. I…
TheEditor
  • 353
  • 1
  • 3
  • 12
6
votes
1 answer

How to use an optical tap? Which fiber should I use?

We have an optical tap (https://www.fs.com/products/73675.html) that provides an LC connector providing two TX instead of RX/TX. As you can see, there is a conflict. What I think I need: A splitter from one LC connector RX/TX to two LC connectors…
Alexis
  • 396
  • 2
  • 14
6
votes
1 answer

What is the jsrv.1 interface for?

I have a Juniper EX2200 switch running JunOS 10.4R4.5. Under Configure -> System Properties -> Management Access, I can configure which interface allow management access. There is a mystery interface call jsrv.1. jsrv.1 is not listed in the…
myron-semack
  • 225
  • 2
  • 8
6
votes
3 answers

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 don't have that much data to send? How does TCP…
TimSch
  • 161
  • 1
  • 4
6
votes
1 answer

Cisco 3750X Power Cable

I received a Cisco 3750X the other day. I went to go plug it in for testing and found that the standard three prong female power connector is no longer compatible with the power supply. Cisco has added a notch to their power supply port making the…
Craken
  • 681
  • 4
  • 21
1 2 3
…
99 100