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1500 questions
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3 answers

Determine Core Size of Fiber Run

We have an existing fiber infrastructure that's several years old. I can't for the life of me read the jacket to get the core size of the fiber, and was wondering if there was a way to measure it without depending on the markings. The fiber is for…
Justin Jahn
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4 answers

TCP Handshake fails on Cisco ASA

I am using a Traffic Generator for setting up a TCP connection that should pass a Cisco ASA firewall. My topology looks like this: +------------------+ | CISCO ASA | …
muehsi
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7
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4 answers

Access-Lists and VLAN and understanding traffic flow

I have a question that I am having a very hard time wrapping my mind around, and I think you might be able to square me away. When applying an access list to a VLAN interface (VLAN 32) in a L3 switch, for clients that are in VLAN 32 subnet, are they…
skrap3e
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3 answers

dhcp failed. apipa is being used

I'm testing a network and I use the vlan among 20 vlan but in this packet tracer I just use 10 Vlan on my network, In this case, I use the DHCP server on my multilayer switch, not on my router. so on the port on multilayer swith to switch layer 2 I…
Bayu Alam
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7
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3 answers

Is there a way to recognize the location where a client connects to the network?

So yes, I'm pretty new to networking and I hope this isn't a stupid question. I couldn't find an answer on google nor could I find something here (but I'm also sure about the terminology), so I thought I give it a shot: Lets say there is a large…
basilikum
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7
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2 answers

Is there a way to create static LSP on a Brocade device?

Is there a way to create a static LSP (i.e. manually specifying in and out labels/interfaces, without LDP or RSVP) on a recent Brocade device running Netiron ? All I can find is an old Foundry static MPLS configuration doc; however, the…
Benjamin A.
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2 answers

Why are my equal cost LSP's not load balancing equally when using auto-bandwidth?

First, I'm adding this question and answering myself because this type of behavior was absolutely no where to be found, hopefully it will help someone. Problem: We use auto bandwidth to handle the bandwidth subscriptions for our LSPs. The LSPs are…
Jordan Head
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7
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Throttling among Data Centers

In general, links among data centers are shared (having shared network infrastructure). Thus, I can't detect the available bandwidth in between two data centers that may vary every while and through the way. Consecutively, I am unable to throttle…
محمد جعفر نعمة
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7
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1 answer

How is probabilistic marking performed with Random Early Detection?

I am currently studying for my Computer Networks exam. I cannot wrap my head around the following. When the current Average Queue Length is in between a min_threshold and a max_threshold, the Random Early Detection algorithm marks every packet it…
Riccardo Angius
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1 answer

Timeouts for ASA VPN peers

I have configured a remote site with two IP addresses for data centre VPN peers - one primary (1.1.1.1), one backup (2.2.2.2). When the primary peer fails, the remote site detects the failure using DPD (after about 15 seconds). It tears down the…
Daren Fulwell
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2 answers

Is 802.11k a security risk?

I'm looking at enabling 802.11k on my Cisco WLC. I see that it is a per-WLAN feature and that leads me to wonder if there might be any reason to not enable it? Specifically, does anyone know if there are security issues with providing clients the…
David
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Under which circumstances Cisco IOS interface SNMP counters start from zero?

Under which circumstances Cisco IOS interface SNMP counters(for example ifHCOutOctets or ifInErrors) start from zero? I am aware that clear counters does not affect SNMP counters. In addition, as far as I know, it is not possible to clear SNMP…
Martin
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2 answers

When does the Cisco IOS SNMP "ifCounterDiscontinuityTime" counter change?

According to Cisco SNMP object navigator, ifCounterDiscontinuityTime(1.3.6.1.2.1.31.1.1.1.19) counter is the value of sysUpTime on the most recent occasion at which any one or more of this interfaces counters suffered a discontinuity. How to cause…
Martin
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5 answers

Moving interface names on a Cisco ASA while maintaining the rest of the configuration in place

My initial problem: I’ve run out of physical ports on my ASA 5525-X My initial solution: Create sub-interfaces on a port-channel and use a switch to aggregate my VLANs The subsequent issue: How do I move the names assigned to the original interfaces…
Matthew Johnson
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What determines the degree of parallelism that can occur over a network?

I'm trying to learn more about how a network (both LAN and Internet) handles traffic, and one part of this is the question of parallelism. In the documentation for Speedtest.net, in describing how exactly the test works, it mentions that "up to 4…
Sean Long
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