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1500 questions
7
votes
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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7
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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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7
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1 answer

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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7
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3 answers

Two ISP bgp topology?

We use palo-alto firewall as an internet gateway. We have 16 static ip-addresses. One is used for outbound traffic (users browse internet) . The rest is used for inbound traffic (mail server, webservers, etc). For redundant purposes we subscribe to…
Алдар
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7
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3 answers

What is the difference between line cards and fabric cards in a CISCO NCS 6000?

I was reading the site preparation guide for the Cisco NCS 6000 Series routers and I saw this line: "The Cisco NCS 6000 Series Routers include the Cisco NCS 6008 Line Card Chassis (LCC) and the Cisco NCS 6000 Fabric Card Chassis (FCC)." Are those…
Nsikan
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7
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3 answers

Split OSPF Area 0 Behavior - What happens?

To make my question as simple as possible, I put together a quick scenario: Area 0 spans two data centers with multiple routers/networks in each. Area 0 has two ABR's connected to area 1 that connect to the same router in area 1. One area 0,1 ABR…
mdm
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7
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1 answer

Reliable connectivity to China

I have been struggling on getting reliable connectivity to China (AS4837 China Unicom Backbone, AS4134 China Telecom Backbone, AS4538 China Education and Research Network Center) On most links I have used I see 300ms+ RTT with high jitter and 50%…
sdaffa23fdsf
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7
votes
1 answer

Do LACP MTUs (or other link-level MTUs) need to match?

Does setting a custom MTU on the host side of a LACP bond require also customizing the MTU on the switch side?
willWorkForCookies
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7
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1 answer

Is CoS supported in a logical system?

This reference states that class of service is supported in a logical system, but another reference disagrees. This may be a disparity between versions, but I have notoiced there is no class of service stanza in a logical system on 12.3. Does the…
Dennis Olvany
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7
votes
3 answers

How to know at what OSI Layer(s) does a firewall operate

I understand that Firewalls may operate on different OSI layers depends on the firewall itself. but how can I know if I install specific firewall at what OSI Layer(s) it does operate ?
basma
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7
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3 answers

Routing traffic between two subnets

I currently admin a small network, it has two separate sites (site1 site2). Each site has independent internet, and a Sonic NSA 220 Firewall. There is currently VPN connecting the two Sonic firewalls, so the sites can communicate without any…
Imagine That
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7
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2 answers

Source NATing Fortigate typical scenario

I have a small query with respect to NATing in Fortigate.I'm struck in particular by a scenario where the remote network allows users with a specific IP range with a specific port for RDP over a different set of physical links.…
Faizan Nizam
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7
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2 answers

How do interfaces behave in a single-ended LACP configuration?

Situation: two ethernet connections, between a switch and a server. At the switch end, the two interfaces are configured for LACP. At the server end, they're configured as normal ethernet interfaces. How do the switch interfaces behave? I believe…
fixit9660
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7
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1 answer

BGP authentication-key-chain vs. authentication-key

I found a neat little behavior on a Juniper box I was working with today. We were migrating from a Cisco ASR to an MX and all of our internet exchange peers that had authentication configured didn't come up. We received log messages on the MX480…
Jordan Head
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7
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3 answers

Difference between trunk and access/voice port

Is there a difference between the following two configurations on a cisco device? int g0/1 switchport mode access switchport access vlan 10 switchport voice vlan 20 and int g0/1 switchport trunk encapsulation dot1q switchport mode trunk switchport…
koron54
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