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[Xen-users] XCP jumbo frames in vm

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] XCP jumbo frames in vm
From: Gregory Durham <gregory.durham@xxxxxxxxx>
Date: Wed, 18 May 2011 13:35:10 -0700
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Hello all,
Not sure if I am completely missing something but here goes. I have
XCP 1.0 running without any issues. I have the mtu set on both the
storage network, the corresponding PIF, and the VIF to 9000 and when
displayed in ifconfig it shows that this is indeed true. I have
several CentOs 5.6 VMs running in HVM mode (i.e. no xen kernel) which
attach to the the storage network through these VIFs and when I
attempt to enable jumbo frames, I receive: SIOCSIFMTU: Invalid
argument, I receive the same error from ifconfig eth1 mtu 9000 and
making the change in the ifcfg-eth1 config file. This is the driver I
have running from lspci -vv
00:04.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
RTL-8139/8139C/8139C+ (rev 20)
        Subsystem: XenSource, Inc. Device 0001
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 64, Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 177
        Region 0: I/O ports at c100 [size=256]
        Region 1: Memory at f3001000 (32-bit, non-prefetchable) [size=256]
        Kernel driver in use: 8139cp
        Kernel modules: 8139too, 8139cp

If I am doing something wrong, please let me know. Or, if it is just
plain not possible. I am pulling my hair out.


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