Thread: [mpls-linux-general] ldp_linux problem
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mpls-linux-general
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From: Elio F. <el...@ti...> - 2001-05-09 22:25:58
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Hello,
I've followed the Readme.cli instruction about ldp-portable but the ldp
don't bind the FEC to the outgoing label.
If I look into /proc/net/mpls_out or /proc/net/mpls_fec I don't find
nothing.
Here is my net:
lo 10.0.0.1 lo 10.0.0.2
-------- -------
| A | | B |
-------- -------
.200| 131.114.33.0/24 |.172
------------------------------------------
Host A's table routing :
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.1 0.0.0.0 255.255.255.255 UH 0
0 0 lo
10.0.0.2 131.114.33.172 255.255.255.255 UGH 0 0
0 eth0
131.114.33.128 0.0.0.0 255.255.255.128 U 0 0
0 eth0
192.168.4.0 0.0.0.0 255.255.255.0 U 0
0 0 eth1
10.0.1.0 131.114.33.172 255.255.255.0 UG 0 0
0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U
0 0 0 lo
0.0.0.0 131.114.33.129 0.0.0.0 UG 1
0 0 eth0
Host B's table routing:
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.1 131.114.33.200 255.255.255.255 UGH 0 0
0 eth0
10.0.0.2 0.0.0.0 255.255.255.255 UH
0 0 0 lo
131.114.33.128 0.0.0.0 255.255.255.128 U 0
0 0 eth0
192.168.4.0 131.114.33.200 255.255.255.0 UG 0 0
0 eth0
10.0.1.0 0.0.0.0 255.255.255.0 U
0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U
0 0 0 lo
0.0.0.0 131.114.33.129 0.0.0.0 UG
1 0 0 eth0
ldp_linux command:
Host A:
add global 10.0.0.1
add i eth0
show session
1 837221ac 45 5
show database
1 0a000001/32 3 via 2
2 0a000002/32 3 via 2
3 0a000100/24 3 via 2
4 7f000000/8 3 via 2
5 83722180/31 3 via 2
6 c0a80400/24 3 via 2
7 0a000001/32 2 via 2
8 0a000002/32 2 via 2
9 0a000100/24 2 via 2
10 7f000000/8 2 via 2
11 83722180/31 2 via 2
12 c0a80400/24 2 via 2
Host B:
add global 10.0.0.2
add i eth0
show session
1 837221ac 45 5
show database
1 0a000001/32 3 via 2
2 0a000002/32 3 via 2
3 0a000100/24 3 via 2
4 7f000000/8 3 via 2
5 83722180/31 3 via 2
6 c0a80400/24 3 via 2
7 0a000001/32 2 via 2
8 0a000002/32 2 via 2
9 0a000100/24 2 via 2
10 7f000000/8 2 via 2
11 83722180/31 2 via 2
12 c0a80400/24 2 via 2
Thank you for an answer,
Elio
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From: Elio F. <el...@ti...> - 2001-05-10 06:41:35
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Hello,
I've followed the Readme.cli instruction about ldp-portable but the ldp
don't bind the FEC to the outgoing label.
If I look into /proc/net/mpls_out or /proc/net/mpls_fec I don't find
nothing.
Here is my net:
lo 10.0.0.1 lo 10.0.0.2
-------- -------
| A | | B |
-------- -------
.200| 131.114.33.0/24 |.172
------------------------------------------
Host A's table routing :
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.1 0.0.0.0 255.255.255.255 UH 0
0 0 lo
10.0.0.2 131.114.33.172 255.255.255.255 UGH 0 0
0 eth0
131.114.33.128 0.0.0.0 255.255.255.128 U 0 0
0 eth0
192.168.4.0 0.0.0.0 255.255.255.0 U 0
0 0 eth1
10.0.1.0 131.114.33.172 255.255.255.0 UG 0 0
0 eth0
127.0.0.0 0.0.0.0 255.0.0.0 U
0 0 0 lo
0.0.0.0 131.114.33.129 0.0.0.0 UG 1
0 0 eth0
Host B's table routing:
Destination Gateway Genmask Flags
Metric Ref Use Iface
10.0.0.1 131.114.33.200 255.255.255.255 UGH 0 0
0 eth0
10.0.0.2 0.0.0.0 255.255.255.255 UH
0 0 0 lo
131.114.33.128 0.0.0.0 255.255.255.128 U 0
0 0 eth0
192.168.4.0 131.114.33.200 255.255.255.0 UG 0 0
0 eth0
10.0.1.0 0.0.0.0 255.255.255.0 U
0 0 0 eth1
127.0.0.0 0.0.0.0 255.0.0.0 U
0 0 0 lo
0.0.0.0 131.114.33.129 0.0.0.0 UG
1 0 0 eth0
ldp_linux command:
Host A:
add global 10.0.0.1
add i eth0
show session
1 837221ac 45 5
show database
1 0a000001/32 3 via 2
2 0a000002/32 3 via 2
3 0a000100/24 3 via 2
4 7f000000/8 3 via 2
5 83722180/31 3 via 2
6 c0a80400/24 3 via 2
7 0a000001/32 2 via 2
8 0a000002/32 2 via 2
9 0a000100/24 2 via 2
10 7f000000/8 2 via 2
11 83722180/31 2 via 2
12 c0a80400/24 2 via 2
Host B:
add global 10.0.0.2
add i eth0
show session
1 837221ac 45 5
show database
1 0a000001/32 3 via 2
2 0a000002/32 3 via 2
3 0a000100/24 3 via 2
4 7f000000/8 3 via 2
5 83722180/31 3 via 2
6 c0a80400/24 3 via 2
7 0a000001/32 2 via 2
8 0a000002/32 2 via 2
9 0a000100/24 2 via 2
10 7f000000/8 2 via 2
11 83722180/31 2 via 2
12 c0a80400/24 2 via 2
Thank you for an answer,
Elio
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From: Yvan P. <yv...@vi...> - 2001-07-09 13:37:28
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Hi,
I tried ldp_linux on my testbed with 3 routers (2 LERs + 1 LSR) but I got
a problem with the LSR.
Topology:
(networks 10.0.a.0 with netmask 255.255.255.0 for each subnet 10.0.a.0)
Host1 eth1---eth1 LERA eth2---eth2 LSR eth3---eth3 LERB eth4---eth4 Host2
1.1 1.2 2.1 2.2 3.1 3.2 4.1 4.2
The problem is that there is no label swapping at the LSR on packets from
LER B to LER A. The LSR swaps labels correctly for packets from LER A to
LER B:
(ping from LER A to LER B with route recording on)
$ ping -R -c1 10.0.4.2
PING 10.0.4.2 (10.0.4.2) from 10.0.1.1 : 56(124) bytes of data.
64 bytes from 10.0.4.2: icmp_seq=0 ttl=253 time=0.5 ms
RR: 10.0.1.1
10.0.2.1
10.0.3.1 --> due to no label swapping by the LSR
10.0.4.1
10.0.4.2
10.0.4.2
10.0.3.2 --> 10.0.2.2 is absent (expected)
10.0.1.2
10.0.1.1
contents of /proc/net/mpls_*:
* on LER A
LABELSPACE:
eth2 0
FEC:
40004804 10.0.3.0/24
40004c04 10.0.4.0/24
TUNNEL:
IN:
40004000 gen 16 0 POP DLV
40004400 gen 17 0 POP DLV
40004800 gen 18 0 POP DLV
40004c00 gen 19 0 POP DLV
40005000 gen 20 0 POP DLV
OUT:
40004804 PUSH(gen 18) SET(eth2)
40004c04 PUSH(gen 19) SET(eth2)
* on LSR
LABELSPACE:
eth2 0
eth3 0
FEC:
40004404 10.0.1.0/24
40004805 10.0.4.0/24
TUNNEL:
IN:
40004000 gen 16 0 POP DLV
40004400 gen 17 0 POP DLV
40004800 gen 18 0 POP DLV
40004c00 gen 19 0 POP DLV
40005000 gen 20 0 POP DLV
40005400 gen 21 0 POP DLV
40005800 gen 22 0 POP DLV
40005c00 gen 23 0 POP FWD(40004404)
40006000 gen 24 0 POP DLV
40006400 gen 25 0 POP DLV
40006800 gen 26 0 POP DLV
40006c00 gen 27 0 POP DLV
OUT:
40004404 PUSH(gen 17) SET(eth2)
40004805 PUSH(gen 18) SET(eth3)
* On LER B
LABELSPACE:
eth3 0
FEC:
40005c05 10.0.1.0/24
40006005 10.0.2.0/24
TUNNEL:
IN:
40004000 gen 16 0 POP DLV
40004400 gen 17 0 POP DLV
40004800 gen 18 0 POP DLV
40004c00 gen 19 0 POP DLV
40005000 gen 20 0 POP DLV
OUT:
40005c05 PUSH(gen 23) SET(eth3)
40006005 PUSH(gen 24) SET(eth3)
Routing tables (only the information about subnets 10.0.x.0 is relevant):
LER A
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Iface
10.0.4.0 10.0.2.2 255.255.255.0 UG 0 eth2
10.0.1.0 * 255.255.255.0 U 0 eth1
10.0.2.0 * 255.255.255.0 U 0 eth2
10.0.3.0 10.0.2.2 255.255.255.0 UG 0 eth2
LSR
$ route
Kernel IP routing table
Destination Gateway Genmask Flags Metric Iface
10.0.4.0 10.0.3.2 255.255.255.0 UG 0 eth3
10.0.1.0 10.0.2.1 255.255.255.0 UG 0 eth2
10.0.2.0 * 255.255.255.0 U 0 eth2
10.0.3.0 * 255.255.255.0 U 0 eth3
LER B
Kernel IP routing table
Destination Gateway Genmask Flags Metric Iface
10.0.4.0 * 255.255.255.0 U 0 eth4
10.0.1.0 10.0.3.1 255.255.255.0 UG 0 eth3
10.0.2.0 10.0.3.1 255.255.255.0 UG 0 eth3
10.0.3.0 * 255.255.255.0 U 0 eth3
The routing tables are symetric, but the label bindings are not !
Do you have an explication about this behavior ? why is an entry in the
LSR label forwarding table missing ?
Thanks,
Yvan Pointurier
________________________________________________________________________
yv...@po... University of Virginia
http://www.pointurier.org Department of Computer Science
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From: James R. L. <jl...@mi...> - 2001-07-09 22:48:34
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Hello, Are you using ldp-portable from CVS? If so, then I need more info to debug further. I need the ouput of the 'show' commands, and the output from ldp_linux on the LSR with 'set trace 0xffffffff'. Jim On Mon, Jul 09, 2001 at 09:36:39AM -0400, Yvan Pointurier wrote: > Hi, > > I tried ldp_linux on my testbed with 3 routers (2 LERs + 1 LSR) but I got > a problem with the LSR. > > Topology: > (networks 10.0.a.0 with netmask 255.255.255.0 for each subnet 10.0.a.0) > > Host1 eth1---eth1 LERA eth2---eth2 LSR eth3---eth3 LERB eth4---eth4 Host2 > 1.1 1.2 2.1 2.2 3.1 3.2 4.1 4.2 > > > The problem is that there is no label swapping at the LSR on packets from > LER B to LER A. The LSR swaps labels correctly for packets from LER A to > LER B: > > (ping from LER A to LER B with route recording on) > $ ping -R -c1 10.0.4.2 > PING 10.0.4.2 (10.0.4.2) from 10.0.1.1 : 56(124) bytes of data. > 64 bytes from 10.0.4.2: icmp_seq=0 ttl=253 time=0.5 ms > RR: 10.0.1.1 > 10.0.2.1 > 10.0.3.1 --> due to no label swapping by the LSR > 10.0.4.1 > 10.0.4.2 > 10.0.4.2 > 10.0.3.2 --> 10.0.2.2 is absent (expected) > 10.0.1.2 > 10.0.1.1 > > contents of /proc/net/mpls_*: > * on LER A > > LABELSPACE: > eth2 0 > > FEC: > 40004804 10.0.3.0/24 > 40004c04 10.0.4.0/24 > > TUNNEL: > > IN: > 40004000 gen 16 0 POP DLV > 40004400 gen 17 0 POP DLV > 40004800 gen 18 0 POP DLV > 40004c00 gen 19 0 POP DLV > 40005000 gen 20 0 POP DLV > > OUT: > 40004804 PUSH(gen 18) SET(eth2) > 40004c04 PUSH(gen 19) SET(eth2) > > * on LSR > > LABELSPACE: > eth2 0 > eth3 0 > > FEC: > 40004404 10.0.1.0/24 > 40004805 10.0.4.0/24 > > TUNNEL: > > IN: > 40004000 gen 16 0 POP DLV > 40004400 gen 17 0 POP DLV > 40004800 gen 18 0 POP DLV > 40004c00 gen 19 0 POP DLV > 40005000 gen 20 0 POP DLV > 40005400 gen 21 0 POP DLV > 40005800 gen 22 0 POP DLV > 40005c00 gen 23 0 POP FWD(40004404) > 40006000 gen 24 0 POP DLV > 40006400 gen 25 0 POP DLV > 40006800 gen 26 0 POP DLV > 40006c00 gen 27 0 POP DLV > > OUT: > 40004404 PUSH(gen 17) SET(eth2) > 40004805 PUSH(gen 18) SET(eth3) > > * On LER B > > LABELSPACE: > eth3 0 > > FEC: > 40005c05 10.0.1.0/24 > 40006005 10.0.2.0/24 > > TUNNEL: > > IN: > 40004000 gen 16 0 POP DLV > 40004400 gen 17 0 POP DLV > 40004800 gen 18 0 POP DLV > 40004c00 gen 19 0 POP DLV > 40005000 gen 20 0 POP DLV > > OUT: > 40005c05 PUSH(gen 23) SET(eth3) > 40006005 PUSH(gen 24) SET(eth3) > > > Routing tables (only the information about subnets 10.0.x.0 is relevant): > LER A > $ route > Kernel IP routing table > Destination Gateway Genmask Flags Metric Iface > 10.0.4.0 10.0.2.2 255.255.255.0 UG 0 eth2 > 10.0.1.0 * 255.255.255.0 U 0 eth1 > 10.0.2.0 * 255.255.255.0 U 0 eth2 > 10.0.3.0 10.0.2.2 255.255.255.0 UG 0 eth2 > > LSR > $ route > Kernel IP routing table > Destination Gateway Genmask Flags Metric Iface > 10.0.4.0 10.0.3.2 255.255.255.0 UG 0 eth3 > 10.0.1.0 10.0.2.1 255.255.255.0 UG 0 eth2 > 10.0.2.0 * 255.255.255.0 U 0 eth2 > 10.0.3.0 * 255.255.255.0 U 0 eth3 > > LER B > Kernel IP routing table > Destination Gateway Genmask Flags Metric Iface > 10.0.4.0 * 255.255.255.0 U 0 eth4 > 10.0.1.0 10.0.3.1 255.255.255.0 UG 0 eth3 > 10.0.2.0 10.0.3.1 255.255.255.0 UG 0 eth3 > 10.0.3.0 * 255.255.255.0 U 0 eth3 > > > The routing tables are symetric, but the label bindings are not ! > Do you have an explication about this behavior ? why is an entry in the > LSR label forwarding table missing ? > > Thanks, > > Yvan Pointurier > ________________________________________________________________________ > yv...@po... University of Virginia > http://www.pointurier.org Department of Computer Science > > > > > _______________________________________________ > mpls-linux-general mailing list > mpl...@li... > http://lists.sourceforge.net/lists/listinfo/mpls-linux-general -- James R. Leu |
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