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TCAM relationships in hardware-switching architecture

I am familiar (high level) with how Ternary Content Addressable Memory operates but I remain confused as to how TCAM relates to ASICs and when these components possibly also combine with the CPU for greater switching performance... (particularly…
MattE
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Does bridging add delay?

If I use a bridge to perform traffic sniffing like man in the middle will the bridge add a delay? And what word should I use delay or latency?
nufuniliza
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What is the use-case of including the IPv4 address in IPv6 address?

It is possible to include the IPv4 address into IPv6 address. For example, 2001:db8::c0a8:6301 where last 32 bits are IPv4 address 192.168.99.1. There is even a special notation of IPv6 address where last 32 bits are in dot-decimal notation. Example…
Martin
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Multiple LAN interfaces on SonicWALL

We have a SonicWALL 2400. Is there any way to assign multiple interfaces to the same LAN subnet? Basically, we would like to have X1 for the WAN and X0, X2, X3 and X4 connected to 4 devices that would form a LAN. Due to limited space, we are unable…
ATNPGO
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Setting up PIM Sparse mode

I am working on trying to setup our network for multicast traffic. In the coming months we will be installing new equipment that sends out multicast traffic. In the past we have only had 1 VLAN so we just used IGMP querier and snooper and this met…
DanielJay
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Why don't switches rewrite mac-addresses?

Is there any particular reason why Ethernet switches don't change the MAC address of a packet? Is it for end host identification using the MAC address, or anything else?
user2720323
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How are Weighted Fair Queuing and Weighted Random Early Detection related?

I'm trying to understand how QoS systems work and I'm not sure how exactly would WFQ and WRED interact. At first, I thought that WFQ is a queuing mechanism and that WRED is a congestion avoidance mechanism. WFQ should schedule packets in queues and…
AndrejaKo
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What is backpressure in the context of routers?

There are several references to backpressure as regards to the internal bandwidth and switching fabrics of routers and switches. What exactly does backpressure mean, and what are the real world ramifications?
Aaron
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measure one-way latency/jitter/packet-loss

I'm getting increased latency and StDev due to route congestion and packet loss, but the forward and reverse paths go over distinct networks (e.g. one being init7.net, the other one being he.net), so, it's very difficult to understand which network…
cnst
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Is QoS an issue for VOIP calls over the Internet? If not, why not?

I'm trying to decide whether I should buy SIP trunks from my ISP or a 3rd-party. As I understand it, it's important to maintain QoS on an internal network (i.e. prioritize VOIP traffic). Is this not also true on a public network? My ISP says that…
Travis
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How is tcp/ip implemented

Well, first of all I am new to networking. And I have studied the layered structure of tcp/ip protocol stack. I know that the layered structure is an abstract model, but I didn't know how the protocol stack is implemented in an operating system.…
user273747
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Which Python modules are you using for network management and automation?

I was wondering if anyone has some favorite modules for doing things like SNMP, CLI screen scraping, netconf, etc...
netdad
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Does IP provide QoS or not?

IP provides a best-effort delivery service. I believe this implies, among other things, that it offers no QoS to the users. However, IP has a byte in its headers (ToS in v4 and Trafic Class in v6) that I think does indeed offer some sort of QoS. So…
Tendero
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How `UDP Hole Punching` Works?

Can anyone explain how UDP hole punching works in a simple way? I know how NAT and PAT works, but can't get a clear idea about UDP hole punching.
arif
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Using IP subnet at multiple datacenters

We control IPv4 and IPv6 subnets. Now we'd like to use a part of a /24 IPv4 subnet at one datacenter and another part at another datacenter. I know that announcing the subnet on the internet at multiple DCs would create an Anycast scenario so…
Matthias Merkel
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