Hello!
I've got a test environment:
SwitchA---SwitchB---SwitchC
SwitchA and SwitchB is a 3560E Cat. (Universal-M IOS 12.2(53)SE2 )
SwitchC is a 3550 Cat. (SMI IOS 12.2(25)SEA )
CDP is fully enabled.
A vlan is configured over this little switch cloud. For example - vlan_id 77.
I configured two SVI's with IP addresses in that vlan on SwitchA and SwitchC:
SVI on Switch A:
SwitchA#sh interfaces vlan 77
Vlan77 is up, line protocol is up
Hardware is EtherSVI, address is 3cdf.1e62.4042 (bia 3cdf.1e62.4042)
Internet address is 172.16.1.2/30
SVI on Switch C:
SwitchC#sh interfaces vlan 77
Vlan77 is up, line protocol is up
Hardware is EtherSVI, address is 000d.bcd9.9d00 (bia 000d.bcd9.9d00)
Internet address is 172.16.1.1/30
Some diags concerning mac-addresses assigned to those SVIs:
SwitchA#sh mac address-table | i 3cdf.1e62.4042
SwitchA#
SwitchA#sh mac address-table dynamic vlan 77
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
77 000d.bcd9.9d00 DYNAMIC Te0/2
Total Mac Addresses for this criterion: 1
SwitchC#sh mac-address-table | i 000d.bcd9.9d00
All 000d.bcd9.9d00 STATIC CPU
SwitchC#sh mac-address-table dynamic vlan 77
Mac Address Table
-------------------------------------------
Vlan Mac Address Type Ports
---- ----------- -------- -----
77 3cdf.1e62.4042 DYNAMIC Po2
Ping from SwitchC to SwitchA is OK:
SwitchC#ping 172.16.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms
When I try to do traceroute mac, or traceroute mac ip I get:
From SwitchC to SwitchA:
SwitchC#traceroute mac 000d.bcd9.9d00 3cdf.1e62.4042 vlan 77 detail
Error: Source Mac address not found.
Layer2 trace aborted.
From SwitchA to SwitchC:
SwitchA#traceroute mac 3cdf.1e62.4042 000d.bcd9.9d00 vlan 77 detail
Error: Source Mac address not found.
Layer2 trace aborted.
Command reference says:
This example shows the Layer 2 path when the switch cannot find the destination port for the source MAC address:
Switch# traceroute mac 0000.0011.1111 0000.0201.0201
Error:Source Mac address not found.
Layer2 trace aborted.
Does this mean that SVI's are not considered by IOS as destination ports?
How can I overcome this feature/bug/limitation ? Make a static entry for those SVI MACs, bounding them to trunks, or whatever ?
Thanks in advance.
wbr, Alex.
DAO21-RIPE
