OpenStack-虚拟机mtu值修改
指尖二进制 • 1 年前 • 759 次点击 • OPENSTACK
查看网络
[root@node-1 ~]# neutron net-list
+--------------------------------------+----------------------------------------------------+-------------------------------------------------------+
| id | name | subnets |
+--------------------------------------+----------------------------------------------------+-------------------------------------------------------+
| 0f54a6e4-79e1-4ab9-a67d-a612e9041bd5 | external_net | 693858d1-ab13-43f2-9639-805697d224ae 192.168.97.0/24 |
| 37d69624-c057-4989-92ea-fdd8f3445726 | network | 42192e25-d5b3-47d3-896b-854c49eefb1d 10.110.22.0/24 |
| 5bc982a0-633a-4160-ac89-bc0f73026c96 | HA network tenant a152b59677a045b0bbca952b2d083378 | 69789b3a-9cdf-4050-8ae4-723cb829d34b 169.254.192.0/18 |
+--------------------------------------+----------------------------------------------------+-------------------------------------------------------+查看网络详细 mtu 值是否是1500
[root@node-1 ~]# neutron net-show 0f54a6e4-79e1-4ab9-a67d-a612e9041bd5
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| availability_zone_hints | |
| availability_zones | nova |
| created_at | 2021-09-28T03:56:59 |
| description | |
| id | 0f54a6e4-79e1-4ab9-a67d-a612e9041bd5 |
| ipv4_address_scope | |
| ipv6_address_scope | |
| is_default | False |
| mtu | 1500 |
| name | external_net |
| port_security_enabled | True |
| provider:network_type | flat |
| provider:physical_network | physnet-ex1 |
| provider:segmentation_id | |
| qos_policy_id | |
| router:external | True |
| shared | True |
| status | ACTIVE |
| subnets | 693858d1-ab13-43f2-9639-805697d224ae |
| tags | |
| tenant_id | a152b59677a045b0bbca952b2d083378 |
| updated_at | 2021-09-28T03:56:59 |
+---------------------------+--------------------------------------+修改mtu值为1500
echo "1500" > /sys/class/net/eth0/mtu1472mtu值 + 28位包头
[root@node-1 ~]# ping -c 3 -s 1472 -M do 192.168.97.232
PING 192.168.97.232 (192.168.97.232) 1472(1500) bytes of data.
1480 bytes from 192.168.97.232: icmp_seq=1 ttl=64 time=0.282 ms
1480 bytes from 192.168.97.232: icmp_seq=2 ttl=64 time=0.256 ms
1480 bytes from 192.168.97.232: icmp_seq=3 ttl=64 time=0.279 ms