[j-nsp] BGP EVPN, VXLAN and ECMP
Vincent Bernat
bernat at luffy.cx
Thu Mar 29 07:00:37 EDT 2018
❦ 29 mars 2018 12:22 +0200, Sebastian Wiesinger <sebastian at karotte.org> :
>> # run show route 10.16.39.3
>>
>> inet.0: 240 destinations, 1808 routes (240 active, 0 holddown, 0 hidden)
>> + = Active Route, - = Last Active, * = Both
>>
>> 10.16.39.3/32 *[BGP/140] 00:38:24, localpref 500, from 10.64.0.5
>> AS path: I, validation-state: unverified
>> to 10.64.0.23 via xe-0/0/46.181
>> > to 10.64.128.23 via xe-0/0/47.183
>
> Can you do a 'run show route 10.16.39.3 extensive'?
Here is the full output. There are two selected paths (and two
additional paths which are not used due to lower preference).
vbe at net-connect001.gv2> show route 10.16.39.3 extensive
inet.0: 236 destinations, 908 routes (236 active, 0 holddown, 0 hidden)
10.16.39.3/32 (4 entries, 1 announced)
TSI:
KRT in-kernel 10.16.39.3/32 -> {list:indirect(131094), indirect(131205)}
*BGP Preference: 140/-501
Next hop type: Indirect, Next hop index: 0
Address: 0xb21c210
Next-hop reference count: 3
Source: 10.64.0.5
Next hop type: Router, Next hop index: 1885
Next hop: 10.64.0.23 via xe-0/0/46.181
Session Id: 0x0
Next hop type: Router, Next hop index: 1767
Next hop: 10.64.128.23 via xe-1/0/47.183, selected
Session Id: 0x0
Protocol next hop: 10.64.0.23
Indirect next hop: 0xc5ceb00 131205 INH Session ID: 0x0
Protocol next hop: 10.64.128.23
Indirect next hop: 0xc5b8780 131094 INH Session ID: 0x0
State: <Active Int Ext>
Local AS: 65199 Peer AS: 65098
Age: 2:15:52 Metric2: 0
Validation State: unverified
Task: BGP_65098_65098.10.64.0.5
Announcement bits (4): 0-KRT 2-BGP_Listen.0.0.0.0+179 4-Resolve tree 2 6-Resolve tree 3
AS path: I (Originator)
Cluster list: 10.64.0.0
Originator ID: 100.64.0.23
Accepted Multipath
Localpref: 500
Router ID: 10.64.0.5
Indirect next hops: 2
Protocol next hop: 10.64.0.23
Indirect next hop: 0xc5ceb00 131205 INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.0.23 via xe-0/0/46.181
Session Id: 0x0
10.64.0.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-0/0/46.181
Protocol next hop: 10.64.128.23
Indirect next hop: 0xc5b8780 131094 INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.128.23 via xe-1/0/47.183
Session Id: 0x0
10.64.128.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-1/0/47.183
BGP Preference: 140/-501
Next hop type: Indirect, Next hop index: 0
Address: 0xb3a3730
Next-hop reference count: 2
Source: 10.64.128.4
Next hop type: Router, Next hop index: 1767
Next hop: 10.64.128.23 via xe-1/0/47.183, selected
Session Id: 0x0
Protocol next hop: 10.64.128.23
Indirect next hop: 0xc5b8780 131094 INH Session ID: 0x0
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Cluster list length
Local AS: 65199 Peer AS: 65098
Age: 2:16:00 Metric2: 0
Validation State: unverified
Task: BGP_65098_65098.10.64.128.4
AS path: I (Originator)
Cluster list: 10.64.128.1 10.64.128.0
Originator ID: 100.64.0.23
Accepted MultipathContrib
Localpref: 500
Router ID: 10.64.128.4
Indirect next hops: 1
Protocol next hop: 10.64.128.23
Indirect next hop: 0xc5b8780 131094 INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.128.23 via xe-1/0/47.183
Session Id: 0x0
10.64.128.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-1/0/47.183
BGP Preference: 140/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xb3a4ff0
Next-hop reference count: 1
Source: 10.64.64.5
Next hop type: Router, Next hop index: 0
Next hop: 10.64.64.23 via xe-0/0/46.182, selected
Session Id: 0x0
Protocol next hop: 10.64.64.23
Indirect next hop: 0xc5dae00 - INH Session ID: 0x0
State: <Int Ext Changed>
Inactive reason: Local Preference
Local AS: 65199 Peer AS: 65098
Age: 2:15:48 Metric2: 0
Validation State: unverified
Task: BGP_65098_65098.10.64.64.5
AS path: I (Originator)
Cluster list: 10.64.64.0
Originator ID: 100.64.0.23
Accepted
Localpref: 100
Router ID: 10.64.64.5
Indirect next hops: 1
Protocol next hop: 10.64.64.23
Indirect next hop: 0xc5dae00 - INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.64.23 via xe-0/0/46.182
Session Id: 0x0
10.64.64.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-0/0/46.182
BGP Preference: 140/-101
Next hop type: Indirect, Next hop index: 0
Address: 0xb3b6cf0
Next-hop reference count: 1
Source: 10.64.192.4
Next hop type: Router, Next hop index: 0
Next hop: 10.64.192.23 via xe-1/0/47.184, selected
Session Id: 0x0
Protocol next hop: 10.64.192.23
Indirect next hop: 0xc5ce380 - INH Session ID: 0x0
State: <NotBest Int Ext>
Inactive reason: Not Best in its group - Cluster list length
Local AS: 65199 Peer AS: 65098
Age: 2:15:56 Metric2: 0
Validation State: unverified
Task: BGP_65098_65098.10.64.192.4
AS path: I (Originator)
Cluster list: 10.64.192.1 10.64.192.0
Originator ID: 100.64.0.23
Accepted
Localpref: 100
Router ID: 10.64.192.4
Indirect next hops: 1
Protocol next hop: 10.64.192.23
Indirect next hop: 0xc5ce380 - INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.192.23 via xe-1/0/47.184
Session Id: 0x0
10.64.192.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-1/0/47.184
:vxlan.inet.0: 13 destinations, 13 routes (13 active, 0 holddown, 0 hidden)
10.16.39.3/32 (1 entry, 1 announced)
TSI:
KRT in-kernel 10.16.39.3/32 -> {indirect(131457)}
*Static Preference: 1
Next hop type: Indirect, Next hop index: 0
Address: 0xb3c9bf0
Next-hop reference count: 2
Next hop type: Router, Next hop index: 1767
Next hop: 10.64.128.23 via xe-1/0/47.183, selected
Session Id: 0x0
Protocol next hop: 10.16.39.3
Indirect next hop: 0xc5e6c80 131457 INH Session ID: 0x0
State: <Active Int NSR-incapable VxlanLocalRT>
Age: 2:15:47 Metric2: 0
Validation State: unverified
Task: RPD Unix Domain Server./var/run/rpd_serv.local
Announcement bits (1): 0-KRT
AS path: I
Indirect next hops: 1
Protocol next hop: 10.16.39.3 Metric: 0
Indirect next hop: 0xc5e6c80 131457 INH Session ID: 0x0
Indirect path forwarding next hops: 1
Next hop type: Router
Next hop: 10.64.128.23 via xe-1/0/47.183
Session Id: 0x0
10.16.39.3/32 Originating RIB: inet.0
Metric: 0 Node path count: 2
Indirect nexthops: 2
Protocol Nexthop: 10.64.0.23
Indirect nexthop: 0xc5ceb00 131205 INH Session ID: 0x0
Path forwarding nexthops link: 0xd135a38
Path inh link: 0x0
Indirect path forwarding nexthops: 1
Nexthop: 10.64.0.23 via xe-0/0/46.181
Session Id: 0
10.64.0.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-0/0/46.181
Protocol Nexthop: 10.64.128.23
Indirect nexthop: 0xc5b8780 131094 INH Session ID: 0x0
Path forwarding nexthops link: 0xd127210
Path inh link: 0x0
Indirect path forwarding nexthops: 1
Nexthop: 10.64.128.23 via xe-1/0/47.183
Session Id: 0
10.64.128.0/18 Originating RIB: inet.0
Node path count: 1
Forwarding nexthops: 1
Next hop type: Interface
Nexthop: via xe-1/0/47.183
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