[mpls-linux-general] UDP traffic problem

[Chris R. <Chr...@nr...>]

Anyone notice udp traffic problems through a LER<->LSR<->LER LSP?  For 
example, if I attempt to issue the command "traceroute -n [target-ip]" 
the traceroute will fail.  If I add the TCP switch, aka "traceroute -n 
-T [target-ip]", the trace works fine.  Also, any nslookups fail, again 
because the lookup request are udp packets.  Wireshark is showing 
checksum errors on the traceroute packets but I'm not sure that is 
causing the problem as the error maybe misleading.


James R. Leu wrote:
> If the goal is to use NFS as root filesystem all one needs to do is create
> a initrd with the NFS modules, it is not required to build a kernel
> with NFS statically included.
>
> The key to allowing this to happen is you need to make sure your
> /etc/fstab has an entry for the root filesystem that spells out what NFS
> resource to use.
>
> For example:
>
>     172.16.1.1:/my/nfs/root / nfs defaults 0 0
>
> Then install the MPLS enabled kernel RPM and as part of that it builds
> an initrd, and now that you have a fstab that indicates where to get root
> from it should build you a nfs enabled initrd.
>
> On Sun, Feb 10, 2008 at 05:12:44PM +0200, Adrian Popa wrote:
>   
>> James, the original problem was that he needs NFS compiled into the kernel
>> in order to boot and the binary kernel you provide has it as a module...
>>
>> On Feb 9, 2008 6:07 AM, James R. Leu <jl...@mi...> wrote:
>>
>>     
>>> I haven't really been following along with your setup, so excuse me
>>> if I'm asking questions that you already answered.
>>>
>>> Why are you install SRPMs as opposed to the binary RPMs?  If you're
>>> on a different distribution and compiling them by hand, please include the
>>> commands you used to do the compilation and installation.
>>>
>>> On Fri, Feb 08, 2008 at 06:45:09PM +0530, Bhartendu Maheshwari wrote:
>>>       
>>>> Hello All,
>>>>
>>>>
>>>>
>>>> I have compiled and installed 2.6.22 mpls enabled
>>>> kernel(kernel-2.6.22.5-76.fc7.mpls.1.958.src.rpm), and also installed
>>>> the following packages:-
>>>>
>>>>
>>>>
>>>> ebtables-2.0.8-1.fc7.mpls.1.958b.src.rpm
>>>>
>>>> iproute-2.6.20-2.fc7.mpls.1.958b.src.rpm
>>>>
>>>> iptables-1.3.8-2.1.fc7.mpls.1.958.src.rpm
>>>>         
>>>>
>>>> But unable to find mpls utility to configure system, please let me know
>>>> if I am missing any package or any patch.
>>>>
>>>>
>>>>
>>>> System Information:-
>>>>
>>>>
>>>>
>>>> [root@localhost linux-2.6.22]# cat /var/log/dmesg | grep MPLS
>>>>
>>>> MPLS: version 1.958
>>>>
>>>> MPLS: protocol driver interface - <jl...@mi...>
>>>>
>>>> MPLS: IPv4 over MPLS support
>>>>
>>>> MPLS: Ethernet over MPLS support
>>>>
>>>> [root@localhost linux-2.6.22]# sysctl -A|grep os
>>>>
>>>> kernel.ostype = Linux
>>>>
>>>> kernel.osrelease = 2.6.22.5
>>>>
>>>> kernel.hostname = localhost.localdomain
>>>>
>>>> net.core.message_cost = 5
>>>>
>>>> net.ipv4.route.error_cost = 1000
>>>>
>>>> net.netfilter.nf_conntrack_tcp_timeout_close_wait = 60
>>>>
>>>> net.netfilter.nf_conntrack_tcp_timeout_close = 10
>>>>
>>>> net.netfilter.nf_conntrack_tcp_loose = 1
>>>>
>>>> dev.cdrom.info = Can close tray:                1
>>>>
>>>> dev.cdrom.autoclose = 1
>>>>
>>>> [root@localhost linux-2.6.22]#
>>>>
>>>>
>>>>
>>>> Kernel Configuration enabled are:-
>>>>
>>>>
>>>>
>>>> 1.
>>>>
>>>> In Networking Options the following items will be compiled in kernel :
>>>>
>>>> <*> Multiprotocol Label Switching
>>>>
>>>> <*> MPLS: Virtual tunnel interface
>>>>
>>>> <*> 802.1d Ethernet Bridging
>>>>
>>>> <*> Bridge: MPLS support
>>>>
>>>>
>>>>
>>>> 2.
>>>>
>>>> In Bridge: Netfilter configuration menu the following minimum options
>>>> will be selected:
>>>>
>>>> <*> Ethernet Bridge tables (ebtables) support
>>>>
>>>> <*> ebt: broute table support
>>>>
>>>> <*> ebt: filter table support
>>>>
>>>> <*> ebt: nat table support
>>>>
>>>> <*> ebt: 802.3 filter support
>>>>
>>>> <*> ebt: MPLS target support
>>>>
>>>>
>>>>
>>>> 3.
>>>>
>>>> In Networking Options select QoS and fair queueing
>>>>
>>>>
>>>>
>>>> Thanks & Regards
>>>>
>>>> Bhartendu M.
>>>>
>>>>
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>>> --
>>> James R. Leu
>>> jl...@mi...
>>>
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>>>
>>>       
>
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-- 
Christopher Robson
Senior Computer Scientist, GS-15
Naval Research Laboratory
Center for Computational Science
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