Turnbough, Bradley E.
2012-Sep-14 14:10 UTC
[CentOS] Bonding Eth interfaces - unexpeceted results
CentOS 6.2.........
Why do the physical interfaces report (correctly) that they're negotiated at
1000Mb/s, but when I `cat /proc/net/bonding/bond0` I get 100Mbps for the member
interfaces, and when I ` mii-tool bond0` I get 10Mbps for the bond?
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ethtool em1
Settings for em1:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes
ethtool em2
Settings for em2:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes
-------------------------------------------------------------------------------------------------------------------
cat /proc/net/bonding/bond0
Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009)
Bonding Mode: load balancing (round-robin)
MII Status: up
MII Polling Interval (ms): 0
Up Delay (ms): 0
Down Delay (ms): 0
Slave Interface: em1
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: XX:XX:XX:XX:XX:XX
Slave queue ID: 0
Slave Interface: em2
MII Status: up
Speed: 100 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: XX:XX:XX:XX:XX:XX
Slave queue ID: 0
---------------------------------------------------------------------------------------------------
mii-tool bond0
bond0: 10 Mbit, half duplex, link ok
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> CentOS 6.2......... > > Why do the physical interfaces report (correctly) that they're negotiated > at 1000Mb/s, but when I `cat /proc/net/bonding/bond0` I get 100Mbps for > the member interfaces, and when I ` mii-tool bond0` I get 10Mbps for the > bond? > > > ----------------------------------------------------------------------------------------- > > ethtool em1 > > Settings for em1: > Supported ports: [ TP ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Advertised pause frame use: No > Advertised auto-negotiation: Yes > Speed: 1000Mb/s > Duplex: Full > Port: Twisted Pair > PHYAD: 1 > Transceiver: internal > Auto-negotiation: on > MDI-X: Unknown > Supports Wake-on: g > Wake-on: d > Link detected: yes > > > ethtool em2 > Settings for em2: > Supported ports: [ TP ] > Supported link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Supports auto-negotiation: Yes > Advertised link modes: 10baseT/Half 10baseT/Full > 100baseT/Half 100baseT/Full > 1000baseT/Full > Advertised pause frame use: No > Advertised auto-negotiation: Yes > Speed: 1000Mb/s > Duplex: Full > Port: Twisted Pair > PHYAD: 1 > Transceiver: internal > Auto-negotiation: on > MDI-X: Unknown > Supports Wake-on: g > Wake-on: d > Link detected: yes > > ------------------------------------------------------------------------------------------------------------------- > cat /proc/net/bonding/bond0 > Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009) > > Bonding Mode: load balancing (round-robin) > MII Status: up > MII Polling Interval (ms): 0 > Up Delay (ms): 0 > Down Delay (ms): 0 > > Slave Interface: em1 > MII Status: up > Speed: 100 Mbps > Duplex: full > Link Failure Count: 0 > Permanent HW addr: XX:XX:XX:XX:XX:XX > Slave queue ID: 0 > > Slave Interface: em2 > MII Status: up > Speed: 100 Mbps > Duplex: full > Link Failure Count: 0 > Permanent HW addr: XX:XX:XX:XX:XX:XX > Slave queue ID: 0 > > --------------------------------------------------------------------------------------------------- > > mii-tool bond0 > bond0: 10 Mbit, half duplex, link ok > This e-mail transmission contains information that is confidential and may > be privileged. It is intended only for the addressee(s) named above. If > you receive this e-mail in error, please do not read, copy or disseminate > it in any manner. If you are not the intended recipient, any disclosure, > copying, distribution or use of the contents of this information is > prohibited. Please reply to the message immediately by informing the > sender that the message was misdirected. After replying, please erase it > from your computer system. Your assistance in correcting this error is > appreciated. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >Just one piece of the puzzle...>From mii-tool man page:"This program is obsolete. Valid media are only 100baseT4, 100baseTx-FD,100baseTx-HD, 10baseT-FD and 10baseT-HD ethernet cards. For replacement check ethtool." Paul