1. Link Aggregation Configuration 구성도

1) Link Aggregation Configuration 구성도

 

2) 테스트 장비

  • Emulator : EVE-NG
  • OS : Juniper vMX 18.2R1.9

 

 

2. Link Aggregation Configuration

1) Link Aggregation Configuration

< R1 : Chassis에서 지원하는 Link Aggregation 개수 설정 >
set chassis aggregated-devices ethernet device-count 1

< R1 : Physical Interface를 Link Aggregation Interface에 Binding >
set interfaces ge-0/0/1 ether-options 802.3ad ae0
set interfaces ge-0/0/2 ether-options 802.3ad ae0
set interfaces ge-0/0/3 ether-options 802.3ad ae0
set interfaces ge-0/0/4 ether-options 802.3ad ae0

< R1 : Aggregation Ethernet(ae) Interface 생성 및 Family 설정 >
set interfaces ae0 unit 0 family bridge interface-mode trunk
set interfaces ae0 unit 0 family bridge vlan-id-list 10

< R1 : VLAN 10 생성 및 IRB 설정 >
set interfaces irb unit 10 family inet address 1.1.2.1/24
set bridge-domains VLAN10 vlan-id 10
set bridge-domains VLAN10 routing-interface irb.10
< R2 : Chassis에서 지원하는 Link Aggregation 개수 설정 >
set chassis aggregated-devices ethernet device-count 1

< R2 : Physical Interface를 Link Aggregation Interface에 Binding >
set interfaces ge-0/0/1 ether-options 802.3ad ae0
set interfaces ge-0/0/2 ether-options 802.3ad ae0
set interfaces ge-0/0/3 ether-options 802.3ad ae0
set interfaces ge-0/0/4 ether-options 802.3ad ae0

< R2 : Aggregation Ethernet(ae) Interface 생성 및 Family 설정 >
set interfaces ae0 unit 0 family bridge interface-mode trunk
set interfaces ae0 unit 0 family bridge vlan-id-list 10

< R2 : VLAN 10 생성 및 IRB 설정 >
set interfaces irb unit 10 family inet address 1.1.2.2/24
set bridge-domains VLAN10 vlan-id 10
set bridge-domains VLAN10 routing-interface irb.10
  • 'chassis aggregated-devices ethernet device-count'를 정의하지 않을 경우
    • 'show interface terse' 명령어로 Physical Interface가 LAG에 Binding된 것을 확인 가능
    • 'show interface terse' 명령어로 ae0 Interface 확인 불가능
  • 'interface ae0'을 정의하지 않을 경우
    • 'show interface terse' 명령어로 Physical Interface가 LAG에 Binding된 것을 확인 불가능
    • 'show interface terse' 명령어로 ae0 Interface 확인 불가능
  • Physical Interface를 Link Aggregation Interface에 Binding할 때, Physical Interface에 관련된 'unit' Configuration이 있으면 Commit 불가

 

2) Link Aggregation State 확인

root@R1> show interfaces terse | match ae0   
ge-0/0/1.0              up    up   aenet    --> ae0.0
ge-0/0/2.0              up    up   aenet    --> ae0.0
ge-0/0/3.0              up    up   aenet    --> ae0.0
ge-0/0/4.0              up    up   aenet    --> ae0.0
ae0                     up    up
ae0.0                   up    up   bridge
  • Physical Interface가 Link Aggregation Interface인 'ae0'에 Binding된 것을 확인

 

root@R1> show interfaces ae0 extensive 
Physical interface: ae0, Enabled, Physical link is Up
  Interface index: 159, SNMP ifIndex: 540, Generation: 163
  Link-level type: Ethernet, MTU: 1514, Speed: 4Gbps, BPDU Error: None,
  MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
  Flow control: Disabled
  Pad to minimum frame size: Disabled
  Minimum links needed: 1, Minimum bandwidth needed: 1bps
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Current address: 2c:6b:f5:4f:06:c2, Hardware address: 2c:6b:f5:4f:06:c2
  Last flapped   : 2024-10-24 09:30:43 UTC (00:27:15 ago)
  Statistics last cleared: Never
  Traffic statistics:
   Input  bytes  :               103066                    0 bps
   Output bytes  :               109184                    0 bps
   Input  packets:                 1011                    0 pps
   Output packets:                 1012                    0 pps
   IPv6 transit statistics:
   Input  bytes  :                    0
   Output bytes  :                    0
   Input  packets:                    0
   Output packets:                    0
  Dropped traffic statistics due to STP State:
   Input  bytes  :                    0 
   Output bytes  :                    0
   Input  packets:                    0
   Output packets:                    0
  MAC statistics:                      Receive         Transmit
    Broadcast packets                        0                0
    Multicast packets                        0                0
  Input errors:
    Errors: 0, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0,
    Policed discards: 0, Resource errors: 0
  Output errors:
    Carrier transitions: 0, Errors: 0, Drops: 0, MTU errors: 0,
    Resource errors: 0
  Ingress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0                                0                    0                    0
    1                                0                    0                    0
    2                                0                    0                    0
    3                                0                    0                    0
  Egress queues: 8 supported, 4 in use
  Queue counters:       Queued packets  Transmitted packets      Dropped packets
    0                                0                    0                    0
    1                                0                    0                    0
    2                                0                    0                    0
    3                                0                    0                    0
  Queue number:         Mapped forwarding classes
    0                   best-effort
    1                   expedited-forwarding
    2                   assured-forwarding
    3                   network-control

  Logical interface ae0.0 (Index 337) (SNMP ifIndex 541) (Generation 152)
    Flags: Up SNMP-Traps 0x24024000 Encapsulation: Ethernet-Bridge
    Statistics        Packets        pps         Bytes          bps
    Bundle:
        Input :             0          0             0            0
        Output:             0          0             0            0
    Adaptive Statistics:
        Adaptive Adjusts:          0
        Adaptive Scans  :          0
        Adaptive Updates:          0
    Link:
      ge-0/0/1.0
        Input :             0          0             0            0
        Output:          1011          0        103066            0
      ge-0/0/2.0
        Input :             0          0             0            0
        Output:             0          0             0            0
      ge-0/0/3.0
        Input :             0          0             0            0
        Output:             0          0             0            0
      ge-0/0/4.0
        Input :             0          0             0            0
        Output:             0          0             0            0


    Aggregate member links: 4

    Marker Statistics:   Marker Rx     Resp Tx   Unknown Rx   Illegal Rx
      ge-0/0/1.0                 0           0            0            0
      ge-0/0/2.0                 0           0            0            0
      ge-0/0/3.0                 0           0            0            0
      ge-0/0/4.0                 0           0            0            0
    List-Type       Status
    Primary         Active
                Interfaces:
                ge-0/0/1        Up   
                ge-0/0/2        Up   
                ge-0/0/3        Up   
                ge-0/0/4        Up   
    List-Type       Status              
    Backup          Down 
    Standby         Down 
    Protocol bridge, MTU: 1514, Generation: 170, Route table: 3,
    Mesh Group: __all_ces__
      Flags: Is-Primary, Trunk-Mode
root@R2> show interfaces ae0     
Physical interface: ae0, Enabled, Physical link is Up
  Interface index: 159, SNMP ifIndex: 537
  Link-level type: Ethernet, MTU: 1514, Speed: 4Gbps, BPDU Error: None,
  MAC-REWRITE Error: None, Loopback: Disabled, Source filtering: Disabled,
  Flow control: Disabled
  Pad to minimum frame size: Disabled
  Minimum links needed: 1, Minimum bandwidth needed: 1bps
  Device flags   : Present Running
  Interface flags: SNMP-Traps Internal: 0x4000
  Current address: 2c:6b:f5:6e:9f:c5, Hardware address: 2c:6b:f5:6e:9f:c5
  Last flapped   : 2024-10-24 15:45:45 UTC (00:01:30 ago)
  Input rate     : 0 bps (0 pps)
  Output rate    : 4112 bps (3 pps)

  Logical interface ae0.0 (Index 337) (SNMP ifIndex 542)
    Flags: Up SNMP-Traps 0x24024000 Encapsulation: Ethernet-Bridge
    Statistics        Packets        pps         Bytes          bps
    Bundle:
        Input :             0          0             0            0
        Output:             0          0             0            0
    Adaptive Statistics:
        Adaptive Adjusts:          0
        Adaptive Scans  :          0
        Adaptive Updates:          0    
    Protocol bridge, MTU: 1514
      Flags: Is-Primary, Trunk-Mode
  • 'show interface ae0' 명령어를 이용하면 비교적 간단하게 확인 가능
  • vMX에서 Link Aggregation에 Binding된 Physical Interface에 대한 Input/Output Count가 비정상인 것을 확인
    • Local 장비에서 발생되는 데이터는 일부 정상처럼 확인
    • Remote 장비에서 발생되는 데이터는 Physical Interface에 Count가 변경되지 않음을 확인
  • 실장비에서 Link Aggregation에 Binding된 Physical Interface에 대한 Input/Output Count가 정상인 것을 확인

 

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