Bug 76511
| Summary: | /sbin/ip does not set routing table properly for "equal cost multipath" | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Need Real Name <ntoedtmann> |
| Component: | iproute | Assignee: | Phil Knirsch <pknirsch> |
| Status: | CLOSED CURRENTRELEASE | QA Contact: | Brock Organ <borgan> |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 8.0 | CC: | dnehring, rvokal |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i386 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2004-04-20 14:20:04 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
OK, seems to be working nicely on RHEL3, FC1 and FC2, so closing this bug as currentrelease. Read ya, Phil |
Description of Problem: We try to test (and if successful use) "equal cost multipath" routing using RH80 and iproute. But the /sbin/ip binary seems not to be able to handle multiple "nexthop" args in the "ip route" command properly. It always sets the wrong weight and the options "dead onlink pervasive" to the first route(s). We could force the proper weight by adding the "weight" option, but we could not get rid of that "dead onlink pervasive". The funny observation: if we copy the /sbin/ip binary from a RH73 system to the RH80 system it is able to set the routes properly (but the RH80-/sbin/ip shows therouting table in the same way the RH73-/sbin/ip does). And the problem occurs under different kernels (see below), so we think it's a problem with the ip binary. Version-Release number of selected component (if applicable): iproute-2.4.7-5 Problems occurs under kernel-2.4.18-14 and a selfmade 2.4.19 How Reproducible: Try out Yourself, see "Steps to Reproduce" below Steps to Reproduce: # First, copy /sbin/ip from an RH73-system to /tmp/RH73/sbin/. Then: root@ksinstall4:~# ip route add 10.11.12.0/24 equalize \ nexthop via 192.168.3.110 dev eth0 \ nexthop via 192.168.3.111 dev eth0 root@ksinstall4:~# ip route 10.11.12.0/24 equalize nexthop via 192.168.3.110 dev eth0 weight 256 dead onlink pervasive nexthop via 192.168.3.111 dev eth0 weight 1 192.168.3.0/24 dev eth0 scope link 127.0.0.0/8 dev lo scope link default via 192.168.3.1 dev eth0 # Now the same with the old binary: root@ksinstall4:~# ip route del 10.11.12.0/24 root@ksinstall4:~# /tmp/RH73/sbin/ip route add 10.11.12.0/24 equalize \ nexthop via 192.168.3.110 dev eth0 \ nexthop via 192.168.3.111 dev eth0 root@ksinstall4:~# ip route 10.11.12.0/24 equalize nexthop via 192.168.3.110 dev eth0 weight 1 nexthop via 192.168.3.111 dev eth0 weight 1 192.168.3.0/24 dev eth0 scope link 127.0.0.0/8 dev lo scope link default via 192.168.3.1 dev eth0 (You can force the weight for all hops to 1 by adding "weight 1" to each nexthop in the ip route command) Actual Results: Expected Results: Additional Information: