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authorChristian Breunig <christian@breunig.cc>2024-04-06 12:15:25 +0200
committerChristian Breunig <christian@breunig.cc>2024-04-06 12:15:25 +0200
commit8296cc727066e739c178918a91cfc11d20d26fe1 (patch)
tree5d145b08665435598bb68688c4e01f12eb8e410c /src/conf_mode
parente86761fa1307596c721c3ddf3a61d263e8f5177b (diff)
downloadvyos-1x-8296cc727066e739c178918a91cfc11d20d26fe1.tar.gz
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ethernet: T5862: default MTU is not acceptable in some environments
There are cloud environments available where the maximum supported ethernet MTU is e.g. 1450 bytes, thus we clamp this to the adapters maximum MTU value or 1500 bytes - whatever is lower.
Diffstat (limited to 'src/conf_mode')
-rwxr-xr-xsrc/conf_mode/interfaces_ethernet.py13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/conf_mode/interfaces_ethernet.py b/src/conf_mode/interfaces_ethernet.py
index 41efdb03c..6da7e6a69 100755
--- a/src/conf_mode/interfaces_ethernet.py
+++ b/src/conf_mode/interfaces_ethernet.py
@@ -152,6 +152,19 @@ def get_config(config=None):
base = ['interfaces', 'ethernet']
ifname, ethernet = get_interface_dict(conf, base, with_pki=True)
+ # T5862 - default MTU is not acceptable in some environments
+ # There are cloud environments available where the maximum supported
+ # ethernet MTU is e.g. 1450 bytes, thus we clamp this to the adapters
+ # maximum MTU value or 1500 bytes - whatever is lower
+ if 'mtu' not in ethernet:
+ try:
+ ethernet['mtu'] = '1500'
+ max_mtu = EthernetIf(ifname).get_max_mtu()
+ if max_mtu < int(ethernet['mtu']):
+ ethernet['mtu'] = str(max_mtu)
+ except:
+ pass
+
if 'is_bond_member' in ethernet:
update_bond_options(conf, ethernet)