Default Route on HP Switch

Posted on 2000-02-20
Last Modified: 2013-12-23
In what instance would an HP switch use the default route that it is configured for? If you have a LAN with an HP switch that has its default route set to the ip address of a server that is acting as a gateway to the internet, that doesn't mean that all traffic from the switch will be routed through that internet server will it? Or should the default route be set to ?


Question by:eureeka
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Accepted Solution

klover earned 50 total points
ID: 2540994
If you wanted to telnet into the switch to monitor performance from a different subnet, you'd need a default gateway.  Or if you have SNMP enabled and the SNMP management console is on another subnet, you would need a default gateway.
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Expert Comment

ID: 2542365
eureeka, AFAIK the switch keeps track of all IP addresses on the LANs it links,
so it can direct packets down just the one subnet the address is on; If it is
asked to route a packet to an address it doesn't know, it can broadcast it on
all subnets (and hope there is a gateway on one of them) OR send it to a default
route (e.g your gateway to the outside).

So your setup seems correct - only "unknown" addresses get sent to the subnet
your gateway is on, for it to try to forward.

Sorry klover, I believe your answer is generally correct but doesn't apply here -
the default gateway isn't used for incoming connections by the target host.

Author Comment

ID: 2542564
Ahh....ok, thanks guys!
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Expert Comment

ID: 2542648
eureeka - did you really mean to accept klovers answer?

klover, I think that's 2 you owe me  now :-)

Author Comment

ID: 2542732
Yikes! I'm sorry :-) I don't know why that happened. I can ask another question if you want, hee hee.
LVL 20

Expert Comment

ID: 2542754
Easy mistake to make; Glad we could help anyway.


Expert Comment

ID: 2543123
Since he did not specify the kind of switch or that it was a routing switch...  I belive we are both right.  I though he may have a low end HP Ethernet Switche that simply had a management interface.


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