Company new add a switch, 10 g optical fiber connected and gigabit electricity mouth did not pick up, management vlan100, 192.168, 100.194, the other to 48 gi vlan194 mouth belonging, 192.168.194.1/24, return route 0.0.0.0 address the core switch management vlan100 192.168.100.1, import the configuration, found to ping switches with 192.168.205.201 192.168.100.194 is pass, but cannot ping ping vlan194 ip192.168.194.1 lack, prompt TTL transmission expired, view is direct route is not generated, routing the loopback, why didn't direct routing generation?

CodePudding user response:

There is a final picture vlan194 is down, do you vlan194 port, haven't inserted a terminal? Are you a terminal to go up and have a try,

CodePudding user response:

Is that switches just Wan Zhao fiber plugged into the mouth, gigabit didn't answer one, I have a try,

CodePudding user response:

Well, to Wan Zhao mouth allows, vlan is up , routing generation, ping

CodePudding user response:

CodePudding user response:

Although the original poster got the direct route, but why have acosmia feeling?
If it is in the actual work of network, a vlanif dropped down just expressed this area people sneaked away, don't need to bring the direct routing disappear and anxiety;
If is immersed in the routing table is perfect in the experiment, it can be in the downward gigabit port on a even something, up is good,

On the trunk leads to redundant vlan is a potential safety hazard,

CodePudding user response:

Is to verify, when see the TTL exceeded know is a routing loop, forget why not fall to the ground. Direct routing is not generated, see an article written last year, there is a similar failure, https://blog.csdn.net/wj31932/article/details/97795829, this is my own independent of the first switch, or experience, not impressive,
Conclusion: today
1, svi will take effect, the up vlan status, related to the trunk and access the physical state of at least one is the up state,
2, TTL expired in the transmission, routing loop,