GNS3で保存しておいたFabric Pathが動かない。

概要

  • GNS3で保存したFabric PathのPODを起動するもPingが飛ばない。
  • show commandで確認したところ、CDPレベルで接続ができていない。
  • 接続ができていない理由不明。titaniumuの不安定さが原因?

----------------------------------------------------------------------------------------------------------------------

 

先日作成したFabric PathのPODを使って、show commandの勉強をしようとするも

何かがおかしい。

例えば、show fabricpath isis adjancyの結果がこんな感じ。

S1# sh fabricpath isis adjacency
Fabricpath IS-IS domain: default Fabricpath IS-IS adjacency database:
System ID   SNPA  Level   State  Hold Time   Interface
L2       N/A   1    UP   00:00:21   Ethernet2/2

S1がL2(Leaf Swich)しか隣接関係が確立できていない。

試しにRouter間でPing試験ができるか確認。

R1#ping 192.168.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R1#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

R2#ping 192.168.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R2#ping 192.168.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

 Pingが飛ばない。Ping飛んだところまで確認したのに。。。

 

切り分けてみる。

①sh cdp neighboursでリンクステータスを確認。

⇒S1からは対向のL1、L2、L3が見えるも、L1、L2、L3からはS1が見えない。

S1# sh cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute

Device-ID Local Intrfce Hldtme Capability Platform Port ID
L1(TBDD139A00B) Eth2/1 131 R S I s N7K-C7018 Eth2/1
L2(TBDDF71600B) Eth2/2 147 R S I s N7K-C7018 Eth2/1
L3(TBDD97D000B) Eth2/3 167 R S I s N7K-C7018 Eth2/1

S2# sh cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute

Device-ID Local Intrfce Hldtme Capability Platform Port ID
L1(TBDD139A00B) Eth2/1 165 R S I s N7K-C7018 Eth2/2
L2(TBDDF71600B) Eth2/2 178 R S I s N7K-C7018 Eth2/2
L3(TBDD97D000B) Eth2/3 142 R S I s N7K-C7018 Eth2/2

L1# sh cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute

Device-ID Local Intrfce Hldtme Capability Platform Port ID
S2(TBDD46E300B) Eth2/2 125 R S I s N7K-C7018 Eth2/1
R1 Eth2/3 94 R 7206VXR Gig1/0

L2# sh cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute

Device-ID Local Intrfce Hldtme Capability Platform Port ID
S2(TBDD46E300B) Eth2/2 151 R S I s N7K-C7018 Eth2/2

L3# sh cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
S - Switch, H - Host, I - IGMP, r - Repeater,
V - VoIP-Phone, D - Remotely-Managed-Device,
s - Supports-STP-Dispute

Device-ID Local Intrfce Hldtme Capability Platform Port ID
S2(TBDD46E300B) Eth2/2 171 R S I s N7K-C7018 Eth2/3
R2 Eth2/3 109 R 7206VXR Gig1/0

 ②各装置の接続状態を確認

⇒"sh int brief"の結果からはS1とS2に有意な差はなし。

S1# sh int brief

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up -- 1000 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth2/1 1 eth f-path up none 1000(D) --
Eth2/2 1 eth f-path up none 1000(D) --
Eth2/3 1 eth f-path up none 1000(D) --

S2# sh int brief

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up -- 1000 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth2/1 1 eth f-path up none 1000(D) --
Eth2/2 1 eth f-path up none 1000(D) --
Eth2/3 1 eth f-path up none 1000(D) --

L1# sh int brief

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up -- 1000 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth2/1 1 eth f-path up none 1000(D) --
Eth2/2 1 eth f-path up none 1000(D) --
Eth2/3 55 eth access up none 1000(D) --

L2# sh int brief

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up -- 1000 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth2/1 1 eth f-path up none 1000(D) --
Eth2/2 1 eth f-path up none 1000(D) --

L3# sh int brief

--------------------------------------------------------------------------------
Port VRF Status IP Address Speed MTU
--------------------------------------------------------------------------------
mgmt0 -- up -- 1000 1500

--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Por
t
Interface Ch
#
--------------------------------------------------------------------------------
Eth2/1 1 eth f-path up none 1000(D) --
Eth2/2 1 eth f-path up none 1000(D) --
Eth2/3 55 eth access up none 1000(D) --

③text比較ツールを使ってS1, S2のshow runの結果を比較。

⇒有意な差分なし。

④text比較ツールを使ってL1, L2のshow runの結果を比較。

⇒有意な差分なし。

⑤text比較ツールを使ってL3, L2のshow runの結果を比較。

⇒有意な差分なし。

⑥GNS3を再起動。

⇒結果変わらず。

切り分けしていると、S2やL1が固まってしまった。titaniumの動作が不安定というのはこういうところなのかも。。。