cant ping between SVI's on a Layer 3 switch
Welly_59
Member Posts: 431
in CCNA & CCENT
Using IOU image i have 4 hosts connected to the l3 switch, 2 in vlan10 and 2 in vlan20. I can ping between all hosts with no issues and the routes are in table etc so all seems correct.
What i cant do is ping between SVI's on the switch using extended pings. Also i cant ping the hosts from the switch. Am i being dumb here?
So pinging between vlans from the host devices works fine. Its just pinging from the switch that is not working in any direction - cant ping svi from svi, cant ping hosts from switch etc
EDIT:
Actually i can ping any devices on the default vlan - vlan 1 - but i cant ping other vlans from the switch
What i cant do is ping between SVI's on the switch using extended pings. Also i cant ping the hosts from the switch. Am i being dumb here?
IOU1#sh runBuilding configuration... Current configuration : 2080 bytes ! ! Last configuration change at 19:42:47 UTC Fri Apr 14 2017 ! version 15.6 no service pad service timestamps debug datetime msec service timestamps log datetime msec ! hostname IOU1 ! boot-start-marker boot-end-marker ! ! logging discriminator EXCESS severity drops 6 msg-body drops EXCESSCOLL logging buffered 50000 logging console discriminator EXCESS ! no aaa new-model ! ! ! no ip icmp rate-limit unreachable ! ! ! ! ! ! ! ! ! ! ! ! ! ! ip audit notify log ip audit po max-events 100 no ip domain lookup ip cef no ipv6 cef ! ! ! ! ! ! ! multilink bundle-name authenticated ! ! ! spanning-tree mode pvst spanning-tree extend system-id ! vlan internal allocation policy ascending ! ip tcp synwait-time 5 ! ! ! ! interface Ethernet0/0 switchport switchport access vlan 10 duplex auto ! interface Ethernet0/1 switchport switchport access vlan 10 duplex auto ! interface Ethernet0/2 switchport switchport access vlan 20 duplex auto ! interface Ethernet0/3 switchport switchport access vlan 20 duplex auto ! interface Ethernet1/0 switchport duplex auto ! interface Ethernet1/1 no ip address duplex auto ! interface Ethernet1/2 no ip address duplex auto ! interface Ethernet1/3 no ip address duplex auto ! interface Ethernet2/0 no ip address duplex auto ! interface Ethernet2/1 no ip address duplex auto ! interface Ethernet2/2 no ip address duplex auto ! interface Ethernet2/3 no ip address duplex auto ! interface Ethernet3/0 no ip address duplex auto ! interface Ethernet3/1 no ip address duplex auto ! interface Ethernet3/2 no ip address duplex auto ! interface Ethernet3/3 no ip address duplex auto ! interface Vlan1 ip address 192.168.1.1 255.255.255.0 ! interface Vlan10 ip address 192.168.10.1 255.255.255.0 ! interface Vlan20 ip address 192.168.20.1 255.255.255.0 ! ip forward-protocol nd ! ! no ip http server no ip http secure-server ! ! ! ! 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
So pinging between vlans from the host devices works fine. Its just pinging from the switch that is not working in any direction - cant ping svi from svi, cant ping hosts from switch etc
EDIT:
Actually i can ping any devices on the default vlan - vlan 1 - but i cant ping other vlans from the switch
Comments
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Welly_59
Member Posts: 431
yes its enabled, otherwise i wouldnt have been able to ping between hosts on different vlans
i think its gns3 being glitchy, as i have restarted and now i can ping all devices from the switch itself, but still cant ping the svi's from the switch itself.
Should i be able to ping the svi's from the switch? -
Welly_59
Member Posts: 431
Also tried this in packet tracer with the same result - cant ping an svi from the switch itself
IOU1#sh ip int br Interface IP-Address OK? Method Status Protocol Ethernet0/0 unassigned YES unset up up Ethernet0/1 unassigned YES unset up up Ethernet0/2 unassigned YES unset up up Ethernet0/3 unassigned YES unset up up Ethernet1/0 unassigned YES unset up up Ethernet1/1 unassigned YES unset up up Ethernet1/2 unassigned YES NVRAM up up Ethernet1/3 unassigned YES NVRAM up up Ethernet2/0 unassigned YES NVRAM up up Ethernet2/1 unassigned YES NVRAM up up Ethernet2/2 unassigned YES NVRAM up up Ethernet2/3 unassigned YES NVRAM up up Ethernet3/0 unassigned YES NVRAM up up Ethernet3/1 unassigned YES NVRAM up up Ethernet3/2 unassigned YES NVRAM up up Ethernet3/3 unassigned YES NVRAM up up Vlan1 192.168.1.1 YES NVRAM up up Vlan10 192.168.10.1 YES NVRAM up up Vlan20 192.168.20.1 YES NVRAM up up
VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Et1/0 10 VLAN0010 active Et0/0, Et0/1 20 VLAN0020 active Et0/2, Et0/3 1002 fddi-default act/unsup 1003 token-ring-default act/unsup 1004 fddinet-default act/unsup 1005 trnet-default act/unsup VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2 ---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------ 1 enet 100001 1500 - - - - - 0 0 10 enet 100010 1500 - - - - - 0 0 20 enet 100020 1500 - - - - - 0 0 1002 fddi 101002 1500 - - - - - 0 0 1003 tr 101003 1500 - - - - - 0 0 1004 fdnet 101004 1500 - - - ieee - 0 0 1005 trnet 101005 1500 - - - ibm - 0 0 Primary Secondary Type Ports ------- --------- ----------------- ------------------------------------------
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clarson
Member Posts: 903 ■■■■□□□□□□
back to your basics.
where does a network interface send network traffic.
a) if it is on the same network it sends it to the other mac address.
b) if it isn't on the same network it sends it to the default gateway.
what do you have the default gateway set? -
Welly_59
Member Posts: 431
Clarson it's a L3 switch with up routing enabled. Forgive me if I'm wrong but default-gateway is not used.
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DCD
Member Posts: 475 ■■■■□□□□□□
It maybe just a issue with IOU and packet tracer does have it issues. But I still would input the IP routing command in or high light it in the config because it missing in the original post. Which switch image are you using? -
Welly_59
Member Posts: 431
DCD if IP routing wasnt working i wouldnt be able to ping between host devices in different vlans, so i know thats not the issue. I am using i86bi-linux-l2-adventerprisek9-15.6.0.9S
Also what is weird is that from the switch i can ping the devices on the vlan but not the SVI IP itself -
Welly_59
Member Posts: 431
ok its an IOU bug. If i do the same with i86bi-linux-l2-adventerprisek9-15.1a it works as expected - i can ping the svi ip from itself
