ExtremeWare 7.7 Command Reference Guide
1651
use a single UDP-forwarding profile. UDP packets directed toward a VLAN use an all-ones broadcast
on that VLAN.
Proxy Address Resolution Protocol (ARP) was first developed so that ARP-capable devices could
respond to ARP Request packets on behalf of ARP-incapable devices. Proxy ARP can also be used to
achieve router redundancy and simplify IP client configuration. The Extreme Networks switch supports
proxy ARP for this type of network configuration.
Once IP ARP is configured, the system responds to ARP Requests on behalf of the device, as long as the
following conditions are satisfied:
•
The valid IP ARP Request is received on a router interface.
•
The target IP address matches the IP address configured in the proxy ARP table.
•
The proxy ARP table entry indicates that the system should always answer this ARP Request,
regardless of the ingress VLAN (the
always
parameter must be applied).
After all the proxy ARP conditions have been met, the switch formulates an ARP Response using the
configured MAC address in the packet.
In some networks, it is desirable to configure the IP host with a wider subnet than the actual subnet
mask of the segment. Proxy ARP can be used so that the router answers ARP Requests for devices
outside of the subnet. As a result, the host communicates as if all devices are local. In reality,
communication with devices outside of the subnet are proxied by the router.
Summary of Contents for ExtremeWare 7.7
Page 60: ...60 ExtremeWare 7 7 Command Reference Guide Contents ...
Page 72: ...72 ExtremeWare 7 7 Command Reference Guide Command Reference Overview ...
Page 404: ...404 ExtremeWare 7 7 Command Reference Guide VLAN Commands ...
Page 472: ...472 ExtremeWare 7 7 Command Reference Guide QoS Commands ...
Page 492: ...492 ExtremeWare 7 7 Command Reference Guide NAT Commands ...
Page 890: ...890 ExtremeWare 7 7 Command Reference Guide Security Commands ...
Page 1130: ...1130 ExtremeWare 7 7 Command Reference Guide Security Commands ...
Page 1164: ...1164 ExtremeWare 7 7 Command Reference Guide Configuration and Image Commands ...
Page 1436: ...1436 ExtremeWare 7 7 Command Reference Guide Wireless Commands ...
Page 1490: ...1490 ExtremeWare 7 7 Command Reference Guide EAPS Commands ...
Page 1576: ...1576 ExtremeWare 7 7 Command Reference Guide ESRP Commands ...
Page 1774: ...1774 ExtremeWare 7 7 Command Reference Guide IP Unicast Commands ...
Page 1914: ...1914 ExtremeWare 7 7 Command Reference Guide IGP Commands ...
Page 2000: ...2000 ExtremeWare 7 7 Command Reference Guide BGP Commands i Series Switches Only ...
Page 2140: ...2140 ExtremeWare 7 7 Command Reference Guide IPX Commands i Series Platforms Only ...
Page 2156: ...2156 ExtremeWare 7 7 Command Reference Guide ARM Commands BlackDiamond Switch Only ...
Page 2168: ...2168 ExtremeWare 7 7 Command Reference Guide Remote Connect Commands ...
Page 2346: ...2346 ExtremeWare 7 7 Command Reference Guide PoS Commands BlackDiamond Switch Only ...
Page 2446: ...2446 ExtremeWare 7 7 Command Reference Guide LLDP Commands ...
Page 2496: ...2496 ExtremeWare 7 7 Command Reference Guide H VPLS Commands BlackDiamond Switch Only ...
Page 2620: ...2620 ExtremeWare 7 7 Command Reference Guide Index of Commands ...