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1500 questions
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votes
2 answers

QoS on HP Procurve 2520 and 3800 switches

Do Procurve switches remark cos/dscp values between switches (trust boundaries) as Cisco switches do? I'm wondering if there is an equivalent to "mls qos trust (cos/dscp)" in the HP realm.
Network Canuck
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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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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
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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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4 answers

Toggle Switch for an Ethernet Cable

Is it possible to place a switch in one of the four/five wires of an Ethernet cable that will disable it? For my hardware project I would like the user to be able to disable the internet connection at the flick of a switch! Notes I am aware that…
JBithell
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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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2 answers

"transport input" for AUX port in Cisco routers

On physical layer AUX port works on asynchronous serial RS-232 protocol. However, one can specify various application layer protocols like telnet or SSH as allowed input protocols under AUX line configuration. Am I correct that those protocols are…
Martin
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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
votes
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
votes
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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7
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5 answers

traceroute doesn't print entire route sometimes

Monitoring my network I realized some time ago that traceroute used to print routes more complete than it is doing right now... and, right now, sometimes traceroute omits some devices. For example, this is a more complete traceroute, including my…
Leandros López
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