Q&A###環境
GNS3
###現状
PC-1←→PC-2間の疎通可
ip routingの設定有バージョンですと、異なるVLAN間でも疎通可（トランクリンク除く）
###問題点
R1←→R2のトランクリンクの通信ができないです。
ステータスを確認すると2点、気になる箇所があります。
①Statusが「not-trunking」になってる点
R1#show int fa1/15 trunk Port Mode Encapsulation Status Native vlan Fa1/15 on 802.1q not-trunking 1 Port Vlans allowed on trunk Fa1/15 none Port Vlans allowed and active in management domain Fa1/15 none Port Vlans in spanning tree forwarding state and not pruned Fa1/15 none
R2#show int fa1/15 t Port Mode Encapsulation Status Native vlan Fa1/15 on 802.1q not-trunking 1 Port Vlans allowed on trunk Fa1/15 none Port Vlans allowed and active in management domain Fa1/15 none Port Vlans in spanning tree forwarding state and not pruned Fa1/15 none
②トランクリンクしたポートのProtocolがdownになってる点
R1#show ip int b Interface IP-Address OK? Method Status Protocol FastEthernet1/15 unassigned YES unset up down
R2#show ip int b Interface IP-Address OK? Method Status Protocol FastEthernet1/15 unassigned YES unset up down
###その他ステータス
R1#show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.2.254 - c401.10cc.0000 ARPA Vlan20 Internet 192.168.1.254 - c401.10cc.0000 ARPA Vlan10
R2#show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 192.168.1.253 - c402.1cac.0000 ARPA Vlan10 Internet 192.168.2.253 - c402.1cac.0000 ARPA Vlan20
R1#show run Building configuration... Current configuration : 2008 bytes ! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R1 ! boot-start-marker boot-end-marker ! ! no aaa new-model memory-size iomem 5 no ip routing no ip icmp rate-limit unreachable no 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 no ip route-cache shutdown duplex auto speed auto ! interface Serial0/0 no ip address no ip route-cache shutdown clock rate 2000000 ! interface FastEthernet0/1 no ip address no ip route-cache shutdown duplex auto speed auto ! interface Serial0/1 no ip address no ip route-cache shutdown clock rate 2000000 ! interface Serial0/2 no ip address no ip route-cache shutdown clock rate 2000000 ! interface FastEthernet1/0 ! interface FastEthernet1/1 switchport access vlan 10 ! interface FastEthernet1/2 switchport access vlan 10 ! interface FastEthernet1/3 switchport access vlan 20 ! interface FastEthernet1/4 ! interface FastEthernet1/5 ! 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 switchport trunk allowed vlan 1,2,10,20,1002-1005 switchport mode trunk ! interface Vlan1 no ip address no ip route-cache ! interface Vlan10 ip address 192.168.1.254 255.255.255.0 no ip route-cache ! interface Vlan20 ip address 192.168.2.254 255.255.255.0 no ip route-cache ! 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
R2#show run Building configuration... Current configuration : 1981 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 routing no ip icmp rate-limit unreachable no 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 no ip route-cache shutdown duplex auto speed auto ! interface Serial0/0 no ip address no ip route-cache shutdown clock rate 2000000 ! interface FastEthernet0/1 no ip address no ip route-cache shutdown duplex auto speed auto ! interface Serial0/1 no ip address no ip route-cache shutdown clock rate 2000000 ! interface Serial0/2 no ip address no ip route-cache shutdown clock rate 2000000 ! interface FastEthernet1/0 ! interface FastEthernet1/1 switchport access vlan 10 ! interface FastEthernet1/2 switchport access vlan 20 ! interface FastEthernet1/3 ! interface FastEthernet1/4 ! interface FastEthernet1/5 ! 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 switchport trunk allowed vlan 1,2,10,20,1002-1005 switchport mode trunk ! interface Vlan1 no ip address no ip route-cache ! interface Vlan10 ip address 192.168.1.253 255.255.255.0 no ip route-cache ! interface Vlan20 ip address 192.168.2.253 255.255.255.0 no ip route-cache ! 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
わたしの設定の何がイケなかったのでしょうか(><)
GNS3のバグでしょうか('')
何か分かる方いらっしゃいましたらご教授願います。
回答1件
0
自己解決
問題解決しました。
原因はGNS3特有の仕様で、
トランクリンクの設定をしたポートを一度shutdownしてからno shutdownすることで
show int fa1/15 trunkのステータスがnot-trunkingからtrunkingに表示が変わり、
実際に疎通もできました。
むーん、GNS3にはこのような仕様が多々ありそうで大変です。
何かGNS3に代わるツールがあればいいのにナー('ω')
投稿2018/02/25 08:42
総合スコア172
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