The basic configuration for this topology is here
I mainly use an Olive router ( http://juniper.cluepon.net/index.php/Olive ) connected in my lab with some other nice gear. The standard topology is based on 7 router [J1- J7] that I simulate with logical-router, now Logical-System. I'ts a very common and simple level-2 only isis area, with MPLS and ISO (CLNS) enable on all the backbone interface. RSVP is chosen as the signaling protocol for the MPLS labels.
nick@zion# show logical-systems J4 | no-more
interfaces {
fxp1 {
unit 204 {
description "------- link ptp J2 <-> J4 --";
vlan-id 204;
family inet {
address 10.0.4.9/30;
}
family iso; /* enable CLNS for ISIS */
family mpls; /* enable MPLS packet forwarding */
}
unit 304 {
description "------- link ptp J3 <-> J4 --";
vlan-id 304;
family inet {
address 10.0.2.6/30;
}
family iso;
family mpls;
}
unit 405 {
description "------- link ptp J4 <-> J5 --";
vlan-id 405;
family inet {
address 10.0.2.10/30;
}
family iso;
family mpls;
}
}
lo0 {
unit 4 {
family inet {
address 10.0.3.4/32;
}
family iso {
address 49.0000.0000.0004.00; /* assign ISO net */
}
}
}
}
protocols {
rsvp {
interface all;
}
mpls {
interface all;
}
isis {
level 1 disable;
interface lo0.4 {
passive;
}
interface all { /* prevent DIS election */
point-to-point;
}
}
}
Just to confirm that all things work correctly, some command output to verify that all is going right..
/* verify on witch interface ISIS is running */
nick@zion> show isis interface logical-system J4
IS-IS interface database:
Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric
fxp1.204 2 0x1 Disabled Point to Point 10/10
fxp1.304 2 0x1 Disabled Point to Point 10/10
fxp1.405 2 0x1 Disabled Point to Point 10/10
lo0.4 0 0x1 Passive Passive 0/0
/* TLV 137 permit to show neighbor names...*/
nick@zion> show isis adjacency logical-system J4
Interface System L State Hold (secs) SNPA
fxp1.204 zion-J2 2 Up 25
fxp1.304 zion-J3 2 Up 22
fxp1.405 zion-J5 2 Up 22
/* and the routing table from this point of view... */
nick@zion> show route protocol isis logical-system J4 terse
inet.0: 22 destinations, 22 routes (22 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
A Destination P Prf Metric 1 Metric 2 Next hop AS path
* 10.0.2.0/30 I 18 20 >10.0.2.5
10.0.2.9
* 10.0.3.3/32 I 18 10 >10.0.2.5
* 10.0.3.5/32 I 18 10 >10.0.2.9
* 10.0.3.12/30 I 18 20 >10.0.2.5
* 10.0.4.0/30 I 18 20 10.0.4.10
>10.0.2.5
* 10.0.4.4/30 I 18 30 >10.0.2.5
* 10.0.4.12/30 I 18 20 >10.0.2.5
* 10.0.5.0/24 I 18 30 >10.0.2.5
* 10.0.6.1/32 I 18 20 >10.0.2.5
* 10.0.6.2/32 I 18 10 >10.0.4.10
* 10.0.8.0/30 I 18 30 >10.0.2.9
* 10.0.8.4/30 I 18 20 >10.0.2.9
* 10.0.8.8/30 I 18 20 >10.0.2.9
* 10.0.9.6/32 I 18 20 >10.0.2.9
* 10.0.9.7/32 I 18 20 >10.0.2.9
iso.0: 1 destinations, 1 routes (1 active, 0 holddown, 0 hidden)
mpls.0: 3 destinations, 3 routes (3 active, 0 holddown, 0 hidden)
/* a brief look into the isis database */
nick@zion> show isis database logical-system J4
IS-IS level 1 link-state database:
0 LSPs
IS-IS level 2 link-state database:
LSP ID Sequence Checksum Lifetime Attributes
zion-J1.00-00 0x2a 0xc3ba 774 L1 L2
zion-J2.00-00 0x2a 0xaa64 945 L1 L2
zion-J3.00-00 0x38 0xe99 515 L1 L2
zion-J4.00-00 0x20 0x8c2f 671 L1 L2
zion-J5.00-00 0x2e 0x9fa6 557 L1 L2
zion-J6.00-00 0x14 0x46e2 520 L1 L2
zion-J7.00-00 0x2e 0x3f57 1093 L1 L2
7 LSPs
/* a snipped detailed part of the isis database expose some TED ( Traffic Engineering Database ) information */
nick@zion> show isis database logical-system J4 zion-J4.00-00 extensive
...
Header: LSP ID: zion-J4.00-00, Length: 439 bytes
Allocated length: 1492 bytes, Router ID: 10.0.3.4
Remaining lifetime: 655 secs, Level: 2, Interface: 0
Estimated free bytes: 896, Actual free bytes: 1053
Aging timer expires in: 655 secs
Protocols: IP, IPv6
Packet: LSP ID: zion-J4.00-00, Length: 439 bytes, Lifetime : 1198 secs
Checksum: 0x8c2f, Sequence: 0x20, Attributes: 0x3
NLPID: 0x83, Fixed length: 27 bytes, Version: 1, Sysid length: 0 bytes
Packet type: 20, Packet version: 1, Max area: 0
TLVs:
Area address: 49 (1)
Speaks: IP
Speaks: IPV6
IP router id: 10.0.3.4
IP address: 10.0.3.4
Hostname: zion-J4
IS neighbor: zion-J2.00, Internal, Metric: default 10
IS neighbor: zion-J3.00, Internal, Metric: default 10
IS neighbor: zion-J5.00, Internal, Metric: default 10
IS extended neighbor: zion-J2.00, Metric: default 10
IP address: 10.0.4.9
Neighbor's IP address: 10.0.4.10
Local interface index: 103, Remote interface index: 81
Current reservable bandwidth:
Priority 0 : 100Mbps
Priority 1 : 100Mbps
Priority 2 : 100Mbps
Priority 3 : 100Mbps
Priority 4 : 100Mbps
Priority 5 : 100Mbps
Priority 6 : 100Mbps
Priority 7 : 100Mbps
Maximum reservable bandwidth: 100Mbps
Maximum bandwidth: 100Mbps
Administrative groups: 0
...
Some note about the Junos Version, I currently use:
nick@zion> show version Hostname: zion Model: olive JUNOS Base OS boot [9.6R1.13]
As a side note, Olive is a great gift from Juniper but remember:
"It is also important to remember that Olive exists because Juniper allows it to exist, and is a testament to the mutual respect between the extremely knowledgeable developer and user bases. If the Olive platform became widely abused, Juniper could easily add additional software checks to prevent it from working. Please do not abuse this feature by doing stupid things like contacting JTAC for support on an Olive, or selling illegal copies of the software as "router simulators". This type of activity is likely to have serious legal consequences and/or provoke a justified response from Juniper, so just don't do it."
Post
0 commenti:
Posta un commento