Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Hi all, I've found that at some point, ifconfig has not been listing my aliases correctly either. I haven't changed /etc/conf.d/net for a long time, and yet I only see eth0 when I run ifconfig, and not eth0:1 (which is also created from /etc/conf.d/net) However, if I run ifconfig eth0:1 from the command line, then ifconfig displays it, so I don't know what's going on and why it's changed... On Mon, 2006-12-11 at 23:35 +0100, Pawel Kraszewski wrote: > Dnia poniedziałek, 11 grudnia 2006 18:34, Leandro Melo de Sales napisał: > > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > > "192.168.1.3 netmask 255.255.255.0" > > "192.168.1.6 netmask 255.255.255.0" > > ) > > Well, it is a design flaw to have 3 addresses in overaping networks. From > what > I recall you may use only one non /32 address in a network. If the > requirement is not met, problems arise: Not necessarily. It may be necessary to have multiple addresses on the same subnet. > Problem: You want to broadcast to 192.168.1.255. > Question: From which of these addresses should it origin? The first one it finds? A random one? don't know. you could also say `ping I 192.168.1.2 b 192.168.1.255` > Problem: Someone else broadcasts to 192.168.1.255. > Question: Which of these addresses should catch it? One? All? All of course, it is a broadcast after all :) > I was taught that configurations of multiple-ip-per-net should look like: > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" >"192.168.1.3 netmask 255.255.255.255" >"192.168.1.6 netmask 255.255.255.255" > ) > > Only the first has a regular mask (and therefore is source and target for > broadcasts) - the rest has /32 mask and is only valid for unicast > communication. good idea. > AFAIK this is true for both multiple cards on single network and multiple > aliases on single card. cya, -- Iain Buchanan The other day I... uh, no, that wasn't me. -- Steven Wright -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Dnia poniedziałek, 11 grudnia 2006 18:34, Leandro Melo de Sales napisał: > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > "192.168.1.3 netmask 255.255.255.0" > "192.168.1.6 netmask 255.255.255.0" > ) Well, it is a design flaw to have 3 addresses in overaping networks. From what I recall you may use only one non /32 address in a network. If the requirement is not met, problems arise: Problem: You want to broadcast to 192.168.1.255. Question: From which of these addresses should it origin? Problem: Someone else broadcasts to 192.168.1.255. Question: Which of these addresses should catch it? One? All? I was taught that configurations of multiple-ip-per-net should look like: config_eth0=( "192.168.1.2 netmask 255.255.255.0" "192.168.1.3 netmask 255.255.255.255" "192.168.1.6 netmask 255.255.255.255" ) Only the first has a regular mask (and therefore is source and target for broadcasts) - the rest has /32 mask and is only valid for unicast communication. AFAIK this is true for both multiple cards on single network and multiple aliases on single card. -- Pawel Kraszewski www.kraszewscy.net -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Well, I solve the problem as follows: config_eth0=( "192.168.1.2 netmask 255.255.255.0" "192.168.1.3 netmask 255.255.255.0 label eth0:1" "192.168.1.6 netmask 255.255.255.0 label eth0:2" ) ... and I think that ifconfig can assign more than one ip for a net interface. Thanks for all replies. Leandro 2006/12/11, Mike Williams <[EMAIL PROTECTED]>: On Monday 11 December 2006 17:34, Leandro Melo de Sales wrote: > # ifconfig eth0:0 192.168.1.3 > SIOCSIFADDR: File exists > SIOCSIFFLAGS: Cannot assign requested address > > My /etc/conf.d/net is correct: > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > "192.168.1.3 netmask 255.255.255.0" > "192.168.1.6 netmask 255.255.255.0" > ) > routes_eth0=( "default gw 192.168.1.1" ) > > When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) > everything seems to be ok, but when I type ifconfig I can see just eth0 > interface. So, I tried to execute the ifconfig command listen above but I > got that error. What is wrong? You executed the ifconfig command above. # ip addr list dev eth0 ifconfig can't assign multiple addresses to one interface, but iproute2 can. -- Mike Williams -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
On Monday 11 December 2006 17:34, Leandro Melo de Sales wrote: > # ifconfig eth0:0 192.168.1.3 > SIOCSIFADDR: File exists > SIOCSIFFLAGS: Cannot assign requested address > > My /etc/conf.d/net is correct: > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > "192.168.1.3 netmask 255.255.255.0" > "192.168.1.6 netmask 255.255.255.0" > ) > routes_eth0=( "default gw 192.168.1.1" ) > > When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) > everything seems to be ok, but when I type ifconfig I can see just eth0 > interface. So, I tried to execute the ifconfig command listen above but I > got that error. What is wrong? You executed the ifconfig command above. # ip addr list dev eth0 ifconfig can't assign multiple addresses to one interface, but iproute2 can. -- Mike Williams -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Hello ! Do you check if the requested address is free ? This may be the source of your problem... Try ping 192.168.1.3 to see if this address is already assigned. -- "the principal difference between the Free Software movement and the open source activity is that open source is a development model and Free Software is a social movement" -- RMS On Mon, December 11, 2006 20:28, Leandro Melo de Sales wrote: > Hi Jerry, but the fact is that eth0 (the first ip, 192.168.1.2) is up... > > Any other clue? > > Leandro > > 2006/12/11, Jerry McBride <[EMAIL PROTECTED]>: >> >> On Monday 11 December 2006 12:34, Leandro Melo de Sales wrote: >> > Hi list, >> > >> > # ifconfig eth0:0 192.168.1.3 >> > SIOCSIFADDR: File exists >> > SIOCSIFFLAGS: Cannot assign requested address >> > >> > My /etc/conf.d/net is correct: >> > >> > config_eth0=( "192.168.1.2 netmask 255.255.255.0" >> > "192.168.1.3 netmask 255.255.255.0" >> > "192.168.1.6 netmask 255.255.255.0" >> > ) >> > routes_eth0=( "default gw 192.168.1.1" ) >> > >> > When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) >> > everything seems to be ok, but when I type ifconfig I can see just >> eth0 >> > interface. So, I tried to execute the ifconfig command listen above >> but >> I >> > got that error. What is wrong? >> > >> > Thank you, >> > >> > Leandro >> >> Normally this means you haven't loaded the required nic driver or have >> loaded >> the wrong one... >> >> The lspci tool is your friend, if you need help figuring out which nic >> driver >> you need. >> >> -- >> >> -- >> >> Jerry McBride >> -- >> gentoo-user@gentoo.org mailing list >> >> > -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Hi Jerry, but the fact is that eth0 (the first ip, 192.168.1.2) is up... Any other clue? Leandro 2006/12/11, Jerry McBride <[EMAIL PROTECTED]>: On Monday 11 December 2006 12:34, Leandro Melo de Sales wrote: > Hi list, > > # ifconfig eth0:0 192.168.1.3 > SIOCSIFADDR: File exists > SIOCSIFFLAGS: Cannot assign requested address > > My /etc/conf.d/net is correct: > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > "192.168.1.3 netmask 255.255.255.0" > "192.168.1.6 netmask 255.255.255.0" > ) > routes_eth0=( "default gw 192.168.1.1" ) > > When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) > everything seems to be ok, but when I type ifconfig I can see just eth0 > interface. So, I tried to execute the ifconfig command listen above but I > got that error. What is wrong? > > Thank you, > > Leandro Normally this means you haven't loaded the required nic driver or have loaded the wrong one... The lspci tool is your friend, if you need help figuring out which nic driver you need. -- -- Jerry McBride -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
On Monday 11 December 2006 12:34, Leandro Melo de Sales wrote: > Hi list, > > # ifconfig eth0:0 192.168.1.3 > SIOCSIFADDR: File exists > SIOCSIFFLAGS: Cannot assign requested address > > My /etc/conf.d/net is correct: > > config_eth0=( "192.168.1.2 netmask 255.255.255.0" > "192.168.1.3 netmask 255.255.255.0" > "192.168.1.6 netmask 255.255.255.0" > ) > routes_eth0=( "default gw 192.168.1.1" ) > > When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) > everything seems to be ok, but when I type ifconfig I can see just eth0 > interface. So, I tried to execute the ifconfig command listen above but I > got that error. What is wrong? > > Thank you, > > Leandro Normally this means you haven't loaded the required nic driver or have loaded the wrong one... The lspci tool is your friend, if you need help figuring out which nic driver you need. -- -- Jerry McBride -- gentoo-user@gentoo.org mailing list
[gentoo-user] ifconfig -> SIOCSIFFLAGS: Cannot assign requested address
Hi list, # ifconfig eth0:0 192.168.1.3 SIOCSIFADDR: File exists SIOCSIFFLAGS: Cannot assign requested address My /etc/conf.d/net is correct: config_eth0=( "192.168.1.2 netmask 255.255.255.0" "192.168.1.3 netmask 255.255.255.0" "192.168.1.6 netmask 255.255.255.0" ) routes_eth0=( "default gw 192.168.1.1" ) When I start /etc/init.d/net.eth0 (which is a sym link to net.lo) everything seems to be ok, but when I type ifconfig I can see just eth0 interface. So, I tried to execute the ifconfig command listen above but I got that error. What is wrong? Thank you, Leandro
