• Open Menu Close Menu
  • Apple
  • Shopping Bag
  • Apple
  • Mac
  • iPad
  • iPhone
  • Watch
  • TV
  • Music
  • Support
  • Search apple.com
  • Shopping Bag

Lists

Open Menu Close Menu
  • Terms and Conditions
  • Lists hosted on this site
  • Email the Postmaster
  • Tips for posting to public mailing lists
Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?


  • Subject: Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?
  • From: Doug Bercich <email@hidden>
  • Date: Tue, 28 Apr 2009 12:45:55 -0500

First post here - be gentle.

A 169.254.xxx.xxx address results when an interface asks for a DHCP assignment but does not receive one. There is an RFC for this but I can't think of the number. 

Although you can in some instances ping and use the address on such a configured interface, other routers and switches may not route that subnet at all.  So why not just manually configure the interfaces to a regular private subnet (192.168... 10... 172...) until you can rule out other problems?



On Apr 28, 2009, at 9:38 AM, Ian Mark Salvame <email@hidden> wrote:


The subnet broadcast for Ethernet is 10.194.9.255 while for the wireless computer-to-computer is 169.254.255.255.
When both interfaces are on with Ethernet set as first in the network order, I can successfully ping Host2 connected to en1
with an IP of 169.254.73.226, but I was not able to successfully ping 169.254.255.255.

But when I connected en1 to a router with a broadcast address of 157.184.80.255, I was able to ping the subnet broadcast
even if both en0 and en1 are enabled.

Any idea why is this?


From: Peter Sichel <email@hidden>
To: "email@hidden Programming" <email@hidden>
Sent: Tuesday, April 28, 2009 10:12:31 PM
Subject: Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?

On Apr 28, 2009, at 9:41 AM, Ian Mark Salvame wrote:

> Host1 is Ethernet connected and I created a computer-to-computer network wirelessly.
> I connected Host2 to Host1 through the created computer-to-computer network.

Host1 is now "multihomed" or attached to two networks: (1) Ethernet; (2) computer-to-computer wireless.

Within the Network Preferences Panel, there is a "Network Service Order" which defines which network connection (wired or wireless) will be is used first when it is available.

> I can successfully ping Host2 from Host1.
> But when I tried pinging the broadcast address of en1(i.e. 169.254.255.255) from Host1
> I was not able to get a reply, it keeps on saying "host is down".

Broadcasts are not automatically forwarded from network to another, and 169.254.255.255 is not a universal broadcast address, but a subnet broadcast address that depends on other stations being configured to Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (email@hidden) Help/Unsubscribe/Update your Subscription: This email sent to email@hidden
  • Follow-Ups:
    • Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?
      • From: Ian Mark Salvame <email@hidden>
References: 
 >Created Computer-to-Computer Network ping error when Ethernet is enabled? (From: Ian Mark Salvame <email@hidden>)
 >Re: Created Computer-to-Computer Network ping error when Ethernet is enabled? (From: Peter Sichel <email@hidden>)
 >Re: Created Computer-to-Computer Network ping error when Ethernet is enabled? (From: Ian Mark Salvame <email@hidden>)

  • Prev by Date: Re: DNSServiceUpdateRecord is failing
  • Next by Date: usb ethernet issues
  • Previous by thread: Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?
  • Next by thread: Re: Created Computer-to-Computer Network ping error when Ethernet is enabled?
  • Index(es):
    • Date
    • Thread