Questions tagged [proxy-arp]

For questions about Proxy ARP, where it is a technique by which a device on a given network answers the ARP queries for an IP address that is not on that network. For instance, you are troubleshooting a case where your router uses huge amounts of CPU on ARP requests, that might be caused by proxy ARP.

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How router will send ARP resolve packet when it receive ARP request?

How router will send ARP resolve packet when it receive ARP request ?? Router by default enabled with proxy arp configuration?? If then proxy arp is not configured then what will happen if it receives ...
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Proxy-ARP when the destination device is connected to the same layer-2 switch, but belongs to a different subnet

I have recently learned about Proxy-ARP and am slightly confused about what would happen in the following scenario. Let's say I have two host devices A (IP: 10.0.0.10/24) and B (IP: 10.0.1.10/24) that ...
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Why ARP need ARP cross LAN request?

Why ARP need ARP cross LAN request? When I am reading a document: You see the host A(10.1.0.1/8) send ARP Request for 20.2.0.1/8's MAC address. In general, the ARP request is for MAC address in the ...
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The need of proxy ARP on the next-hop router

I'm watching a video course provided by Cisco, and I came across one interesting part regarding the need of proxy ARP: If a router uses a static route that uses an outgoing interface instead of a ...
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  • 473
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arp or proxy-arp causing high cpu

We have an issue on a Cisco A901-6CZ-F-A with high cpu caused by Arp requests coming on Vlan11 from our customer. We enabled 'debug arp' to try and diagnose, below is a small snippet. IP addresses ...
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ARP requests and multiple interfaces

Suppose a device has both ethernet and wireless interfaces enabled and active. Is it correct that ARP requests from one (e.g., ethernet) cannot reach the other (e.g., wireless) unless a Proxy ARP is ...
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PFsense - Reach via NAT and Proxy ARP destination behind the same firewall without the system knowing the RFC1918-IP

I'm a little bit confused and pretty sure it won't work. But a mate and me are arguing for so long now, I decided to ask you. Imagine a PFSense Firewall with 3 Interfaces. 2 different LAN-Interfaces ...
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Juniper SRX-240. Single Address Translation

Edit Feb 4 The issue remains relevant, any help appreciated. Once again, I'm not a network engineer, so this must be a noob question. Simple task: I have a server in my private network and I need to ...
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4 answers
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Inter-VLAN Routing and Proxy Arp

the network above shown has PC1(10.10.10.1) AND PC2(10.10.10.2) IN VLAN 10 10.10.10.0/24 AND PC3(20.20.20.3) and PC4(20.20.20.4) in VLAN 20 20.20.20.0/24 I have configured all the configuration ...
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Difference between proxy arp and default gateway

Firstly what I understand, Default Gateway--> When we set the default gateway in PC the network layer check the destination IP address and if it is not on same broadcast domain as the source IP ...
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