How to add a resolved next hop to fboss #14
Description
Hi everyone,
I'm trying to configure some routes on fboss(currently with sim_agent) using fboss_route.py and wandering how can I add a route with resolved NH since everything I've tried is unresolved? Actually how to configure resolved NH (or a host which can be used as NH) at all?
Even if I try to add a route with IP of my own interface(10.10.10.1) I see the log message which tells me that the NH is unresolved(see the log below the config). I have even tried to do a hack by calling directly ArpHandler::arpUpdateRequired() from the code and I apparently the ARP entry was added(saw the log message: "Adding ARP entry for 10.10.10.2 --> 10:10:10:10:10:02") but after that when I tried to add a route with 10.10.10.2 NH I still saw this log message about unresolved NH.
BTW, why does this route appear in the table: "Added route 10.10.10.0/24@ State:CR, => 10.10.10.1@I1"? We can not route using our own IP as NH.
Now I'm really confused and don't know how to proceed.
The config is very simple:
{
"version": 0,
"ports": [
{
"logicalID": 1,
"state": 2,
"minFrameSize": 64,
"maxFrameSize": 1500,
"parserType": 1,
"routable": true,
"ingressVlan": 110,
"speed": 0
},
{
"logicalID": 2,
"state": 2,
"minFrameSize": 64,
"maxFrameSize": 1500,
"parserType": 1,
"routable": true,
"ingressVlan": 120,
"speed": 0
}
],
"vlans": [
{
"name": "V110",
"id": 110,
"recordStats": true,
"routable": true,
"ipAddresses": [
"10.10.10.1"
]
},
{
"name": "V120",
"id": 120,
"recordStats": true,
"routable": true,
"ipAddresses": [
"20.20.20.1"
]
}
],
"vlanPorts": [
{
"vlanID": 110,
"logicalPort": 1,
"spanningTreeState": 2,
"emitTags": false
},
{
"vlanID": 120,
"logicalPort": 2,
"spanningTreeState": 2,
"emitTags": false
}
],
"defaultVlan": 110,
"interfaces":
[
{
"intfID": 1,
"routerID": 4,
"vlanID": 110,
"mac":"10:10:10:10:10:01",
"ipAddresses": [
"10.10.10.1/24"
]
},
{
"intfID": 2,
"routerID": 4,
"vlanID": 120,
"mac":"20:20:20:20:20:01",
"ipAddresses": [
"20.20.20.1/24"
]
}
],
"arpTimeoutSeconds": 60,
"arpRefreshSeconds": 20,
"arpAgerInterval": 5,
"proactiveArp": false
}
The log:
./sim_agent --logtostderr=1 --minloglevel=0 -v=3 --config ../fboss.json
I1214 20:53:57.288607 11626 SwSwitch.cpp:294] Registering state observer: IPv6Handler
I1214 20:53:57.288758 11626 SwSwitch.cpp:294] Registering state observer: NeighborUpdater
I1214 20:53:57.289929 11627 SwSwitch.cpp:227] hardware initialized in 0 seconds; applying initial config
I1214 20:53:57.290119 11626 ThriftServer.cpp:223] libevent 2.0.21-stable method epoll
I1214 20:53:57.301103 11627 Main.cpp:135] local MAC is 02:00:00:00:00:01
I1214 20:53:57.301318 11630 SwSwitch.cpp:420] preparing state update apply initial config
I1214 20:53:57.301331 11630 SwSwitch.cpp:919] Loading config from local config file ../fboss.json
I1214 20:53:57.312749 11630 RouteUpdater.cpp:115] Added route 10.10.10.0/24@ State:CR, => 10.10.10.1@I1
I1214 20:53:57.312891 11630 RouteUpdater.cpp:115] Added route 20.20.20.0/24@ State:CR, => 20.20.20.1@I2
I1214 20:53:57.313022 11630 RouteUpdater.cpp:115] Added route fe80::/64@ State:R, => TO_CPU
I1214 20:53:57.313503 11630 SwSwitch.cpp:515] Updating state: old_gen=0 new_gen=1
I1214 20:53:57.313855 11630 SwSwitch.cpp:560] Update state took 281us
I1214 20:53:57.314029 11627 FunctionScheduler.cpp:137] Starting FunctionScheduler with 4 functions.
I1214 20:53:57.314059 11627 FunctionScheduler.cpp:144] - func: updateStats, period = 1000ms, delay = 0ms
I1214 20:53:57.314070 11627 FunctionScheduler.cpp:144] - func: flushWarmBoot, period = 1000ms, delay = 30000ms
I1214 20:53:57.314075 11627 FunctionScheduler.cpp:144] - func: DetectTransceiver, period = 1000ms, delay = 0ms
I1214 20:53:57.314084 11627 FunctionScheduler.cpp:144] - func: CacheUpdateTransceiver, period = 15000ms, delay = 15000ms
I1214 20:53:57.314127 11627 Main.cpp:179] Started background thread: UpdateStatsThread
I1214 20:53:57.331481 11626 Main.cpp:301] serving on localhost on port 5909
I1214 21:02:43.154876 11630 SwSwitch.cpp:420] preparing state update sync fib
I1214 21:02:43.154989 11630 RouteUpdater.cpp:115] Added route 10.10.10.0/24@ State:CR, => 10.10.10.1@I1
I1214 21:02:43.155028 11630 RouteUpdater.cpp:115] Added route 20.20.20.0/24@ State:CR, => 20.20.20.1@I2
I1214 21:02:43.155066 11630 RouteUpdater.cpp:115] Added route fe80::/64@ State:R, => TO_CPU
I1214 21:02:43.155227 11645 ThriftHandler.cpp:86] Sync 0 routes took 363us
I1214 21:02:43.155900 11648 Acceptor.cpp:395] Acceptor=0x2cc8c98 onEmpty()
I1214 21:02:44.977035 11630 SwSwitch.cpp:420] preparing state update add unicast route
I1214 21:02:44.977193 11630 RouteUpdater.cpp:115] Added route 7.7.7.0/24@10.10.10.1. State:, => DROP
I1214 21:02:44.977212 11630 RouteUpdater.cpp:266] Could not find route for nhop : 10.10.10.1
I1214 21:02:44.977223 11630 RouteUpdater.cpp:307] Cannot resolve route 7.7.7.0/24@10.10.10.1. State:U, => DROP
I1214 21:02:44.977314 11630 SwSwitch.cpp:515] Updating state: old_gen=1 new_gen=2
I1214 21:02:44.977344 11630 SwSwitch.cpp:560] Update state took 29us
I1214 21:02:44.977373 11645 ThriftHandler.cpp:86] Add 1 routes took 422us
I1214 21:02:44.977731 11649 Acceptor.cpp:395] Acceptor=0x2ccd228 onEmpty()