| Summary: | Spooled print won't start due to bad routing table | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Dave Blackburn <blackburn> |
| Component: | initscripts | Assignee: | Bill Nottingham <notting> |
| Status: | CLOSED WONTFIX | QA Contact: | Fedora Extras Quality Assurance <extras-qa> |
| Severity: | medium | Docs Contact: | |
| Priority: | unspecified | ||
| Version: | 14 | CC: | iarlyy, initscripts-maint-list, jonathan, jpopelka, notting, plautrba, rvokal, twaugh |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2012-08-16 14:50:37 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
|
Description
Dave Blackburn
2011-03-12 23:32:21 UTC
How have you set up networking? By the look of it, you are not using NetworkManager (as that service is stopped). Did you adjust configuration files by hand, or use some other tool to configure networking? How have you set up networking? By the look of it, you are not using NetworkManager (as that service is stopped). True. Did you adjust configuration files by hand, or use some other tool to configure networking? By hand using a script I developed. # cfgnw -L tennw cat hosts-tennw 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 cs4.cs cs4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 aaa.bbb.ccc.5 cs5 cs5.cs aaa.bbb.ccc.4 cs4 cs4.cs aaa.bbb.ccc.3 cs3 cs3.cs aaa.bbb.ccc.2 cs2 cs2.cs 208.67.220.220 resolver2.opendns.com 208.67.222.222 resolver1.opendns.com cat ifcfg-eth0-tennw DEVICE=eth0 BOOTPROTO=none BROADCAST=aaa.bbb.ccc.255 IPADDR=aaa.bbb.ccc.4 NETMASK=255.255.255.0 NETWORK=aaa.bbb.ccc.0 ONBOOT=yes USERCTL=no PEERDNS=no TYPE=Ethernet cat ifcfg-eth1-tennw DEVICE=eth1 BOOTPROTO=none BROADCAST=aaa.bbb.ccc.255 IPADDR=aaa.bbb.ccc.44 NETMASK=255.255.255.0 NETWORK=aaa.bbb.ccc.0 ONBOOT=yes USERCTL=no PEERDNS=no TYPE=Ethernet cat network-tennw NETWORKING=yes HOSTNAME=cs4.cs FORWARD_IPV4= DOMAINNAME= GATEWAY=aaa.bbb.ccc.1 GATEWAYDEV=eth1 TIMESERV=aaa.bbb.ccc.18 DESC="" cat resolv.conf-tennw ; DNS servers nameserver 208.67.220.220 # resolver2.opendns.com nameserver 208.67.222.222 # resolver1.opendns.com # domain isp.net # search isp.net nameserver aaa.bbb.ccc.1 # ns1.isp.net nameserver aaa.bbb.ccc.2 # ns2.isp.net ifup eth1 causes this entry: 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 ifdown eth1 removes the entry. So this is presumably not a cups bug. By doing ifdown then ifup the unwanted routing entry comes after the eth0 entry. So the eth1 entry no longer causes problems with cups. Based on what I read about 169.254.0.0/16, creation of this entry on ifup is perhaps not a bug. I'm thinking it may be appropriate to close this bug. However, it provides useful workaround info for someone with a config similar to mine. # netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.90.113.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.251.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 10.90.113.1 0.0.0.0 UG 0 0 0 eth1 # ifdown eth1 # netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 192.168.251.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 # ifup eth1 # netstat -nr Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 10.90.113.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.251.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 OK, changing component to initscripts (which owns /sbin/ifup) to verify that there's no bug there. What's the output of 'ip route ls' when you have these routes? ip route ls 10.90.113.0/24 dev eth1 proto kernel scope link src 10.90.113.44 192.168.251.0/24 dev eth0 proto kernel scope link src 192.168.251.4 169.254.0.0/16 dev eth0 scope link metric 1002 169.254.0.0/16 dev eth1 scope link metric 1003 default via 10.90.113.1 dev eth1 Given that they have different metrics (causing the eth0 route to be preferred over the eth1 route), this shouldn't cause any issues. Are you printing via link-local/mDNS? Originally the eth1 route came first. A workaround is to ifdown eth1; ifup eth1 causing eth0 to then be preferred. Printing is configured: hp:/net/HP_LaserJet_P1505n?ip=169.254.181.246 With both routes in the table, but eth1 first, can you ping the printer? >> With both routes in the table, but eth1 first, can you ping the printer?
No.
ifup/ifdown leaves eth1 second.
route del/add was able to get eth1 first.
# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.90.113.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.251.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
0.0.0.0 10.90.113.1 0.0.0.0 UG 0 0 0 eth1
# route del -net 169.254.0.0 netmask 255.255.0.0 dev eth1
# route add -net 169.254.0.0 netmask 255.255.0.0 dev eth1
# netstat -nr
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
10.90.113.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1
192.168.251.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1
169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0
0.0.0.0 10.90.113.1 0.0.0.0 UG 0 0 0 eth1
#
#
# ping 169.254.181.246
PING 169.254.181.246 (169.254.181.246) 56(84) bytes of data.
From 10.90.113.44 icmp_seq=2 Destination Host Unreachable
^C
--- 169.254.181.246 ping statistics ---
4 packets transmitted, 0 received, +3 errors, 100% packet loss, time 2999ms
# route del -net 169.254.0.0 netmask 255.255.0.0 dev eth1
# ping 169.254.181.246
PING 169.254.181.246 (169.254.181.246) 56(84) bytes of data.
64 bytes from 169.254.181.246: icmp_req=1 ttl=255 time=1.05 ms
64 bytes from 169.254.181.246: icmp_req=2 ttl=255 time=0.214 ms
^C
--- 169.254.181.246 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 0.214/0.633/1.053/0.420 ms
I discovered a clean solution to the problem of cups trying to access the printer via 169.254.0.0/24 on the wrong interface.
I simply add:
NOZEROCONF=true
to the appropiate file:
/etc/sysconfig/network-scripts/ifcfg-eth*
in my case eth1
The use of NOZEROCONF can be confusing.
Setting it to yes, no, or anything gives the same result i.e. disabling Zero Configuration Network (ZEROCONF).
Perhaps someone can figure out a way to improve the documentation.
I think it makes sense to convert this bug to a documentation enhancement bug.
These all come up empty:
zgrep NOZEROCONF $(rpm -ql initscripts | grep /man)
zgrep NOZEROCONF $(rpm -ql cups | grep /man)
zgrep NOZEROCONF /usr/share/doc/cups-{[0-9]*,libs*}
It is documented here:
zgrep NOZEROCONF /usr/share/doc/initscripts-*/*
However, knowing to look for NOZEROCONF can be a hurdle (was for me).
Also, knowing where to look can be a hurdle.
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