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?
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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 192.168.1.2Type 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 192.168.1.1Type 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-DisputeDevice-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-DisputeDevice-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-DisputeDevice-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-DisputeDevice-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-DisputeDevice-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。。。