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bfranklin at ntginc.net
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 Posted: Fri Mar 13, 2015 8:34 pm Post subject: [asterisk-users] [OT] switches |
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If your phones support PoE,
I have had huge success with Zyxel:
http://www.amazon.com/ZyXEL-ES1100-16P-16-Port-Ethernet-Unmanaged/dp/B00
5GRETMM/ref=sr_1_3?ie=UTF8&qid=1426296572&sr=8-3&keywords=zyxel+poe
If you want to go even cheaper, I have successfully used these as well:
http://www.amazon.com/TRENDnet-8-Port-100Mbps-Switch-TPE-S44/dp/B000QYEN
1W/ref=sr_1_10?ie=UTF8&qid=1426296706&sr=8-10&keywords=poe+8-port
Brian Franklin
NTG, Inc. - "Problem Solved"
-----Original Message-----
From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of thufir
Sent: Friday, February 20, 2015 1:58 PM
To: asterisk-users@lists.digium.com
Subject: [asterisk-users] [OT] switches
Pardon, this might be off-topic. I'm reading:
http://en.wikipedia.org/wiki/Network_switch
For a setup of ~5 agents, would I be wrong in thinking that a generic 16
port unmanaged switch would fit the bill?
The first model to come up for me in an Amazon search is:
http://support.netgear.com/product/fs116
Is this a reasonable choice? Would I be wrong in thinking that most any
Fast Ethernet switch would be fine for Asterisk?
thanks,
Thufir
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hawat.thufir at gmail.com
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el.es.cr at gmail.com
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| Posted: Mon Mar 23, 2015 5:12 am Post subject: [asterisk-users] [OT] switches |
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On 22/03/15 03:03, thufir wrote:
No, ethernet switch works at lower / physical / MAC layer, NAT is 'above' that;
so as long as everything is OK with your TCP/IP settings everywhere,
a switch is entirely transparent to TCP/IP (or generally, when it's encapsulated
into MAC traffic).
All that happens at a level totally transparent to the TCP/IP stack
In a way, an Ethernet Switch is /the/ network near you, your cables are 'just' interconnects.
HTH,
el es
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davidstahl23 at gmail.com
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| Posted: Mon Mar 23, 2015 7:21 am Post subject: [asterisk-users] [OT] switches |
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| Remember that that zyxel 16 port switch is only 8 poe ports. If your phones are 802.3af or 802.3at, you could look at the ubiquiti line of switches. On Mar 13, 2015 9:34 PM, "Brian Franklin" <bfranklin@ntginc.net (bfranklin@ntginc.net)> wrote: |
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hawat.thufir at gmail.com
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| Posted: Mon Mar 23, 2015 11:38 am Post subject: [asterisk-users] [OT] switches |
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On Mon, 23 Mar 2015 10:11:54 +0000, Lukasz Sokol wrote:
| Quote: | No, ethernet switch works at lower / physical / MAC layer, NAT is
'above'
that;
so as long as everything is OK with your TCP/IP settings everywhere,
a switch is entirely transparent to TCP/IP (or generally, when it's
encapsulated into MAC traffic).
|
so how does a client pc find the server if there's no NAT? by IP
address?? That makes no sense, to me, if the switch isn't assigning
addresses.
-Thufir
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kevin.larsen at pionee...
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| Posted: Mon Mar 23, 2015 11:50 am Post subject: [asterisk-users] [OT] switches |
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| Quote: | so how does a client pc find the server if there's no NAT? by IP
address?? That makes no sense, to me, if the switch isn't assigning
addresses.
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Switches have a MAC table that keeps track of which MAC addresses are on which ports. That's how they decide where to route packets.
http://en.wikipedia.org/wiki/CAM_Table
http://en.wikipedia.org/wiki/OSI_model |
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asterisk.org at sedwar...
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| Posted: Mon Mar 23, 2015 12:07 pm Post subject: [asterisk-users] [OT] switches |
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On Mon, 23 Mar 2015, thufir wrote:
| Quote: | so how does a client pc find the server if there's no NAT? by IP
address?? That makes no sense, to me, if the switch isn't assigning
addresses.
|
The 'endpoint' (pc, softphone, mobile, desk set, etc.) 'finds' the
server's IP address when:
) You configure the endpoint with the IP address or host name of the
server. This happens either by a web page you fill out on the endpoint or
a configuration file that is downloaded by TFTP, FTP, HTTP, etc.
) You configure SRV records in your DNS.
I think the old IAXy did some sort of discovery on port 9999, but I don't
remember if it was device or server discovery.
--
Thanks in advance,
-------------------------------------------------------------------------
Steve Edwards sedwards@sedwards.com Voice: +1-760-468-3867 PST
Newline Fax: +1-760-731-3000
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el.es.cr at gmail.com
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| Posted: Mon Mar 23, 2015 12:19 pm Post subject: [asterisk-users] [OT] switches |
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On 23/03/15 16:37, thufir wrote:
| Quote: | On Mon, 23 Mar 2015 10:11:54 +0000, Lukasz Sokol wrote:
| Quote: | No, ethernet switch works at lower / physical / MAC layer, NAT is
'above'
that;
so as long as everything is OK with your TCP/IP settings everywhere,
a switch is entirely transparent to TCP/IP (or generally, when it's
encapsulated into MAC traffic).
|
so how does a client pc find the server if there's no NAT? by IP
address?? That makes no sense, to me, if the switch isn't assigning
addresses.
-Thufir
|
+1 to what Kevin said, and
there is a protocol running on pretty much every ethernet based network,
named ARP : Address Resolution Protocol, by which ALL the clients learn ALL
the surrounding clients (including the one that is the GATEWAY) MAC/IP combinations.
Simplified, the encapsulation of ethernet packets is sort-of
| MAC Header | IP Header | Packet
|[MAC Source address][MAC Destination Address]|[Source IP][Destination IP]|[The rest of packet]
[order and number of fields not necessarily real-life, for illustration purposes only]
now the MAC source/dest fields are added AND REMOVED as needed when the packet passes
from card to computer/router, then from computer/router to card; as the MAC fields don't make sense in
wider area networks;
'dumb' switches don't participate/snoop in ARP, only store a table of what card MAC address they
encountered on source MAC field of packets coming from that interconnect
manageable switches /can/ participate and filter in the ARP process if told so and have such option.
HTH,
el es
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