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1500 questions
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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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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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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…
Mohamad-Jaafar NEHME
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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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7
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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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Differentiating OUI MAC addresses from random MAC addresses

I am developing a program that creates random MAC addresses. I understand that in order to avoid collisions with OUI addresses, my addresses should "locally-administered" addresses, by setting the second least-significant bit of the first byte (the…
Oren
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7
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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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2 answers

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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7
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3 answers

Cisco IP Phone 7900 Series - Auth Fail on boot

I have several hundred Cisco 7900 series IP phones, (7911, 7942, and 7962 models) that have been sitting on the shelf as replacement stock for several years. Now as we deploy them, we are experiencing some odd firmware issues. When they are…
Brett Lykins
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2 answers

Which address should I choose to send a multicast message on an wireles ad-hoc meshed network?

I am trying to implement a wireless multicast ad-hoc network, but I don't know how it works. I think I have to send my packets to a specific 224.0.0.* address, but I don't which one choose. My network is 192.168.1.0 and the packets are using the…
Vladimir Leiv
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3 answers

Uplinkports between two Cisco stacks gets blocked by RSTP

I should get this figured out by my own, but actually I seem to be a blockedhead. I have two stacks of Cisco 3750X with two switches in each stack. One Stack is in building A, the other one in Building B. Each stack acts as core switch for the…
Sebastian
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Cisco Feature Navigator equivalent for ASA's?

I've recently been using the Cisco Feature Navigator to assess whether or not to upgrade IOS images (and compare them), but it doesn't support ASA software. Is there an easy way to compare images for ASA's like with CFN? If not, how do you do this…
A L
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