Q&A
###環境
GNS3
###現状
【障害試験】
①R2のfa1/4ポートshutdown ⇒ 切り替わりOK
②R2のfa1/5ポートshutdown ⇒ 切り替わりOK
③R2の筐体電源断 ⇒ 切り替わりOK
上記3パターンの障害試験を行い、想定通りR4へ経路が切り替わりPC間の疎通はできております。
しかし、①のパターンのみshow standby briefの結果が変なのです(>_<)
本来であれば、R2のpriority値が10減り、Standbyになるはずです。
5分近く待っても表示が変わることはありませんでした。
以下、実際に表示されているステータスです。
R2#show standby b P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl10 10 105 P Active local 192.168.1.252 192.168.1.254 Vl20 20 105 P Active local 192.168.2.252 192.168.2.254 Vl30 30 105 P Active local 192.168.3.252 192.168.3.254
R4#show standby b P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl10 10 100 Standby 192.168.1.253 local 192.168.1.254 Vl20 20 100 Standby 192.168.2.253 local 192.168.2.254 Vl30 30 100 Standby 192.168.3.253 local 192.168.3.254
R2のfa1/4をshutdownした際のR4のログ(show standby brief有)
R4# *Mar 1 01:31:21.663: %HSRP-5-STATECHANGE: Vlan10 Grp 10 state Standby -> Active R4# *Mar 1 01:31:24.311: %HSRP-5-STATECHANGE: Vlan30 Grp 30 state Standby -> Active *Mar 1 01:31:24.523: %HSRP-5-STATECHANGE: Vlan20 Grp 20 state Standby -> Active R4# R4# R4#show standby b P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl10 10 100 P Active local unknown 192.168.1.254 Vl20 20 100 P Active local unknown 192.168.2.254 Vl30 30 100 P Active local unknown 192.168.3.254 R4# *Mar 1 01:32:03.347: %HSRP-5-STATECHANGE: Vlan30 Grp 30 state Active -> Speak *Mar 1 01:32:03.567: %HSRP-5-STATECHANGE: Vlan20 Grp 20 state Active -> Speak *Mar 1 01:32:03.755: %HSRP-5-STATECHANGE: Vlan10 Grp 10 state Active -> Speak R4# *Mar 1 01:32:13.347: %HSRP-5-STATECHANGE: Vlan30 Grp 30 state Speak -> Standby *Mar 1 01:32:13.567: %HSRP-5-STATECHANGE: Vlan20 Grp 20 state Speak -> Standby *Mar 1 01:32:13.755: %HSRP-5-STATECHANGE: Vlan10 Grp 10 state Speak -> Standby R4#show standby b P indicates configured to preempt. | Interface Grp Prio P State Active Standby Virtual IP Vl10 10 100 P Standby 192.168.1.253 local 192.168.1.254 Vl20 20 100 P Standby 192.168.2.253 local 192.168.2.254 Vl30 30 100 P Standby 192.168.3.253 local 192.168.3.254
一度R4がActiveになるのですが、すぐにStandbyになるのです。不思議です('_')????
R2#show run Building configuration... Current configuration : 2217 bytes ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R2 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 no ip icmp rate-limit unreachable ip cef ! ! ! ! no ip domain lookup ip auth-proxy max-nodata-conns 3 ip admission max-nodata-conns 3 ! ! ! ip tcp synwait-time 5 ! ! ! ! ! ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface Serial0/0 no ip address shutdown clock rate 2000000 ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/1 no ip address shutdown clock rate 2000000 ! interface Serial0/2 no ip address shutdown clock rate 2000000 ! interface FastEthernet1/0 ! interface FastEthernet1/1 ! interface FastEthernet1/2 ! interface FastEthernet1/ *Mar 1 00:00:41.671: %LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up3 ! interface FastEthernet1/4 switchport trunk allowed vlan 1,2,10-30,1002-1005 switchport mode trunk ! interface FastEthernet1/5 switchport trunk allowed vlan 1,2,10-30,1002-1005 switchport mode trunk ! interface FastEthernet1/6 ! interface FastEthernet1/7 ! interface FastEthernet1/8 ! interface FastEthernet1/9 ! interface FastEthernet1/10 ! interface FastEthernet1/11 ! interface FastEthernet1/12 ! interface FastEthernet1/13 ! interface FastEthernet1/14 ! interface FastEthernet1/15 ! interface Vlan1 no ip address ! interface Vlan10 ip address 192.168.1.253 255.255.255.0 standby 10 ip 192.168.1.254 standby 10 priority 105 standby 10 preempt standby 10 track FastEthernet1/5 ! interface Vlan20 ip address 192.168.2.253 255.255.255.0 standby 20 ip 192.168.2.254 standby 20 priority 105 standby 20 preempt standby 20 track FastEthernet1/5 ! interface Vlan30 ip address 192.168.3.253 255.255.255.0 standby 30 ip 192.168.3.254 standby 30 priority 105 standby 30 preempt standby 30 track FastEthernet1/5 ! ip forward-protocol nd ! ! no ip http server no ip http secure-server ! no cdp log mismatch duplex ! ! ! control-plane ! ! ! ! ! ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 logging synchronous line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous line vty 0 4 login ! ! end
R4#show run Building configuration... Current configuration : 2038 bytes ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R4 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 no ip icmp rate-limit unreachable ip cef ! ! ! ! no ip domain lookup ip auth-proxy max-nodata-conns 3 ip admission max-nodata-conns 3 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ip tcp synwait-time 5 ! ! ! ! ! interface FastEthernet0/0 no ip address shutdown duplex auto speed auto ! interface Serial0/0 no ip address shutdown clock rate 2000000 ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/1 no ip address shutdown clock rate 2000000 ! interface Serial0/2 no ip address shutdown clock rate 2000000 ! interface FastEthernet1/0 ! interface FastEthernet1/1 ! interface FastEthernet1/2 ! interface FastEthernet1/3 ! interface FastEthernet1/4 ! interface FastEthernet1/5 ! interface FastEthernet1/6 ! interface FastEthernet1/7 switchport trunk allowed vlan 1,2,10-30,1002-1005 switchport mode trunk ! interface FastEthernet1/8 switchport trunk allowed vlan 1,2,10-30,1002-1005 switchport mode trunk ! interface FastEthernet1/9 ! interface FastEthernet1/10 ! interface FastEthernet1/11 ! interface FastEthernet1/12 ! interface FastEthernet1/13 ! interface FastEthernet1/14 ! interface FastEthernet1/15 ! interface Vlan1 no ip address ! interface Vlan10 ip address 192.168.1.252 255.255.255.0 standby 10 ip 192.168.1.254 standby 10 preempt ! interface Vlan20 ip address 192.168.2.252 255.255.255.0 standby 20 ip 192.168.2.254 standby 20 preempt ! interface Vlan30 ip address 192.168.3.252 255.255.255.0 standby 30 ip 192.168.3.254 standby 30 preempt ! ip forward-protocol nd ! ! no ip http server no ip http secure-server ! no cdp log mismatch duplex ! ! ! control-plane ! ! ! ! ! ! ! ! ! ! line con 0 exec-timeout 0 0 privilege level 15 logging synchronous line aux 0 exec-timeout 0 0 privilege level 15 logging synchronous line vty 0 4 login ! ! end
障害試験の目的は達成できているものの、上記のステータスにモヤモヤしてしまいます。
何かご存知の方いらっしゃいますでしょうか。
何か必要な情報があれば仰ってください。追記いたします。
以上、ご確認お願いいたします(>_<)
###追記
あくまで検証用なので不自然な構成となっております。
R2#show run int vlan 10 Building configuration... Current configuration : 172 bytes ! interface Vlan10 ip address 192.168.1.253 255.255.255.0 standby 10 ip 192.168.1.254 standby 10 priority 105 standby 10 preempt standby 10 track FastEthernet1/5 end
R2#show run int vlan 20 Building configuration... Current configuration : 172 bytes ! interface Vlan20 ip address 192.168.2.253 255.255.255.0 standby 20 ip 192.168.2.254 standby 20 priority 105 standby 20 preempt standby 20 track FastEthernet1/5 end
R2#show run int vlan 30 Building configuration... Current configuration : 172 bytes ! interface Vlan30 ip address 192.168.3.253 255.255.255.0 standby 30 ip 192.168.3.254 standby 30 priority 105 standby 30 preempt standby 30 track FastEthernet1/5 end
回答1件
0
ベストアンサー
HSRPの詳細はとりあえずおいておきます。
そもそも本NW構成においてHSRPは意味をなしていません。（VLAN間通信しようとしているならば設定次第で意味はありますけれど、だとしても構成が不自然です）
なぜならばPC１－６の組、PC２－５の組、PC３－４の組はもともと同一サブネットに属しております。したがって、ルータを経由する必要がなくEthernet接続さえ確保されれば導通します。つまり、R2、R4はルータである必要がなくスイッチとしての機能しか使用されておりません。（さらにいうならばスイッチとしても機能していない、分配していないので。R1とR3を直繋ぎすれば良い。R2とR4はこの構成ではそもそも不要）
投稿2018/02/11 17:06
編集2018/02/11 17:06
総合スコア4830
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2018/02/11 17:33
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2018/02/12 07:31
2018/02/12 08:07 編集