Bug 176787
| Summary: | NM doesn't configure interface-mtu from DHCP response | ||
|---|---|---|---|
| Product: | [Fedora] Fedora | Reporter: | Charles R. Anderson <cra> |
| Component: | NetworkManager | Assignee: | Christopher Aillon <caillon> |
| Status: | CLOSED UPSTREAM | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 4 | ||
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2006-03-01 05:33:20 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: | |||
Filed upstream: http://bugzilla.gnome.org/show_bug.cgi?id=332953 |
Description of problem: My DHCP server sends option interface-mtu 1440 since it is an IPsec VPN gateway. With a custom /etc/dhclient-eth0.conf, dhclient-script handles this option properly, configuring the ethernet interface with the interface-mtu value returned from DHCP. NetworkManager, however, ignores the option. Version-Release number of selected component (if applicable): 0.5.1-1.FC4.4 How reproducible: always Steps to Reproduce: 1. edit ifcfg-eth0 to set ONBOOT=no 2. Reboot 3. Plug ethernet cable in 4. Note that NM did not configure the MTU, leaving it the default MTU:1500 5. service NetworkManager stop 6. ifdown eth0; ifup eth0 7. Note that dhclient did configure the MTU:1440 Actual results: /etc/dhclient-eth0.conf: request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, host-name, nis-domain, nis-servers, ntp-servers, interface-mtu; After bootup with NetworkManger, ifconfig: eth0 Link encap:Ethernet HWaddr 00:0D:60:xx:xx:xx inet addr:a.b.c.d Bcast:a.b.c.255 Mask:255.255.255.0 inet6 addr: fe80::20d:60ff:fexx:xxxx/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1 errors:0 dropped:0 overruns:0 frame:0 TX packets:6 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:355 (355.0 b) TX bytes:744 (744.0 b) Base address:0x8000 Memory:c0240000-c0260000 /var/lib/dhcp/dhclient-eth0.leases: lease { interface "eth0"; fixed-address a.b.c.d; option subnet-mask 255.255.255.0; option routers a.b.c.1; option dhcp-lease-time 3600; option dhcp-message-type 5; option domain-name-servers a.b.c.w,a.b.c.x,a.b.c.y,a.b.c.z; option dhcp-server-identifier a.b.c.1; option interface-mtu 1440; option broadcast-address a.b.c.255; option domain-name "domain"; renew 1 2006/1/2 18:59:52; rebind 1 2006/1/2 19:24:20; expire 1 2006/1/2 19:31:50; } Expected results: NM should configure the interface-mtu with the value returned from the DHCP server. Additional info: The DHCP server's dhcpd.conf has this configured: option interface-mtu 1440;