add portchannel support in snmp

[lguohan]

TASK [test : Check for missing interfaces in SNMP] *****************************
Wednesday 15 March 2017 05:54:42 +0000 (0:00:00.137) 0:01:55.295 *******
failed: [str-s6000-acs-7] => (item=PortChannel01) => {"failed": true, "item": "PortChannel01", "msg": "Minigraph interface PortChannel01 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel01) => {"failed": true, "item": "PortChannel01", "msg": "Minigraph interface PortChannel01 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel02) => {"failed": true, "item": "PortChannel02", "msg": "Minigraph interface PortChannel02 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel02) => {"failed": true, "item": "PortChannel02", "msg": "Minigraph interface PortChannel02 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel03) => {"failed": true, "item": "PortChannel03", "msg": "Minigraph interface PortChannel03 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel03) => {"failed": true, "item": "PortChannel03", "msg": "Minigraph interface PortChannel03 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel04) => {"failed": true, "item": "PortChannel04", "msg": "Minigraph interface PortChannel04 not in SNMP interfaces"}
failed: [str-s6000-acs-7] => (item=PortChannel04) => {"failed": true, "item": "PortChannel04", "msg": "Minigraph interface PortChannel04 not in SNMP interfaces"}

[qiluo-msft]

Requirement:

SNMP subagent implementation should treat all the available PortChannels similar to raw interfaces. Current implementation misses all PortChannels . Related OIDs:

• RFC1213: 1.3.6.1.2.1.2
• RFC2863: 1.3.6.1.2.1.31.1

How to assign IfIndex to PortChannel?

PortChannel<N> --> 1000 + N

How to get a list of available PortChannels and the components of every PortChannel?

127.0.0.1:6379> keys LAG*
1) "LAG_TABLE:PortChannel01"
2) "LAG_TABLE:PortChannel04"
3) "LAG_TABLE:PortChannel03:Ethernet120"
4) "LAG_TABLE:PortChannel03"
5) "LAG_TABLE:PortChannel02:Ethernet116"
6) "LAG_TABLE:PortChannel01:Ethernet112"
7) "LAG_TABLE:PortChannel02"
8) "LAG_TABLE:PortChannel04:Ethernet124"
9) "LAG_TABLE:PortChannel03:Ethernet20" (If there are multiple raw interfaces in a PortChannel, there are multiple keys with the same prefix, and one per interface)

How to get the status of one PortChannel?

127.0.0.1:6379> hgetall  "LAG_TABLE:PortChannel03"
1) "admin_status"
2) "up"
3) "oper_status"
4) "down"
5) "mtu"
6) "1500"

[stcheng]

the output is updated according to the code change: sonic-net/sonic-swss#187

127.0.0.1:6379> keys LAG*                               
 1) "LAG_MEMBER_TABLE:PortChannel56:Ethernet56"         
 2) "LAG_TABLE:PortChannel40"                           
 3) "LAG_MEMBER_TABLE:PortChannel0:Ethernet4"           
 4) "LAG_MEMBER_TABLE:PortChannel32:Ethernet36"         
 5) "LAG_MEMBER_TABLE:PortChannel8:Ethernet8"           
 6) "LAG_TABLE:PortChannel32"                           
 7) "LAG_TABLE:PortChannel16"                           
 8) "LAG_MEMBER_TABLE:PortChannel8:Ethernet12"          
 9) "LAG_MEMBER_TABLE:PortChannel48:Ethernet52"         
10) "LAG_MEMBER_TABLE:PortChannel24:Ethernet28"         
11) "LAG_MEMBER_TABLE:PortChannel16:Ethernet16"         
12) "LAG_TABLE:PortChannel0"                            
13) "LAG_MEMBER_TABLE:PortChannel0:Ethernet0"           
14) "LAG_MEMBER_TABLE:PortChannel40:Ethernet40"         
15) "LAG_MEMBER_TABLE:PortChannel48:Ethernet48"         
16) "LAG_MEMBER_TABLE:PortChannel40:Ethernet44"         
17) "LAG_MEMBER_TABLE:PortChannel32:Ethernet32"         
18) "LAG_TABLE:PortChannel48"                           
19) "LAG_TABLE:PortChannel24"                           
20) "LAG_MEMBER_TABLE:PortChannel56:Ethernet60"         
21) "LAG_MEMBER_TABLE:PortChannel24:Ethernet24"         
22) "LAG_TABLE:PortChannel56"                           
23) "LAG_MEMBER_TABLE:PortChannel16:Ethernet20"         
24) "LAG_TABLE:PortChannel8"