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a
Guest
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 Posted: Sat Jul 28, 2007 12:37 am Post subject: ethernet addr for router |
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Hi
How many ethernet addr are there for a router? one for each port or only one
for the whole router?
How many ethernet addr are there for a switch?
Thanks |
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Trendkill
Guest
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| Posted: Sun Jul 29, 2007 5:27 pm Post subject: Re: ethernet addr for router |
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On Jul 27, 10:27 pm, "Peter" <SOME...@orcon.net.nz> wrote:
| Quote: | Greetings,
How many ethernet addr are there for a router? one for each port or only one
for the whole router?
It all depends on HOW the router is configured, as an interface may or
may not have an IP address, and in addition, the Router may have
virtual interfaces that also may or may not have an address. You can
have a Router that has ZERO IP address, or one that has hundreds more
IP addresses than physical interfaces. It all depends on the
configuration.
How many ethernet addr are there for a switch?
Again, it all depends on HOW the device is configured, for the exact
same reasons.
Cheers..............pk.
--
Peter from Auckland.
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Unless the switch is a layer 3 switch, the switch will have only one
interface. I suppose you can configure sc1 and sc2 on the old
catalysts if you desire, but traditionally speaking, there is one for
management. |
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stephen
Guest
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| Posted: Sun Jul 29, 2007 8:00 pm Post subject: Re: ethernet addr for router |
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"Trendkill" <jpmason@gmail.com> wrote in message
news:1185712062.386241.150600@q75g2000hsh.googlegroups.com...
| Quote: | On Jul 27, 10:27 pm, "Peter" <SOME...@orcon.net.nz> wrote:
Greetings,
How many ethernet addr are there for a router? one for each port or
only one
for the whole router?
It all depends on HOW the router is configured, as an interface may or
may not have an IP address, and in addition, the Router may have
virtual interfaces that also may or may not have an address. You can
have a Router that has ZERO IP address, or one that has hundreds more
IP addresses than physical interfaces. It all depends on the
configuration.
How many ethernet addr are there for a switch?
Again, it all depends on HOW the device is configured, for the exact
same reasons.
Cheers..............pk.
--
Peter from Auckland.
Unless the switch is a layer 3 switch, the switch will have only one
interface. I suppose you can configure sc1 and sc2 on the old
catalysts if you desire, but traditionally speaking, there is one for
management.
OP Q was about Enet addresses on a router, not a switch. |
However - the lines between the 2 tend to blur these days - think of the Cat
6509 which is also the 7609 router depending on card mix, chassis label and
software....
AFAIR each port on a modern router has at least 1 Ethernet adr, but may be
given others due to config.
normally the ports will not have the same adr, since you might configure
some things that dont like that, such as spanning tree bridging.
eg set up OSI, Decnet on the port, the extra adr is added to the original.
ie IP will use the original adr unless told otherwise, but Decnet will use
the one required to define the DEC adr.
--
Regards
stephen_hope@xyzworld.com - replace xyz with ntl |
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