a1876b84e5
Not all interfaces have the same characteristics within the bonding group. For active-backup mode, we should do our best to select the slave that performs the best as the primary slave. We already did that by preferring the slave that is local numa. Sometimes, this is not enough. For example, when all are local numas, the selection is arbitrary. Some slave interfaces may have higher speed or better qos than the others. But this is hard to infer. One rule does not fit all. So we let the operator to optionally specify the weight for each slave interface. Our primary slave selection rule is now 1. biggest weight 2. is local numa 3. current primary slave (to avoid churn) 4. lowest sw_if_index (for deterministic behavior) This selection rule only applies to active-backup mode which only one slave is used for forwarding traffic until it becomes unreachable. At that time, the next "best" slave candidate is automatically promoted. The slaves are sorted according to the preference rule when they are up. So there is no need to find the next best candidate when the primary slave goes down. Another good thing about this rule is when the down slave comes back up, it is selected as the primary slave again unless there is indeed a "better" slave than this down slave that were added during that period. To set the weight for the slave interface, do this after the interface is enslaved set interface bond <interface-name> weight <value> Type: feature Signed-off-by: Steven Luong <sluong@cisco.com> Change-Id: I59ced6d20ce1dec532e667dbe1afd1b4243e04f9
49 lines
1.6 KiB
Python
49 lines
1.6 KiB
Python
from vpp_object import VppObject
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from vpp_interface import VppInterface
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class VppBondInterface(VppInterface):
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"""VPP bond interface."""
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def __init__(self, test, mode, lb=0, numa_only=0,
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use_custom_mac=0, mac_address=''):
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""" Create VPP Bond interface """
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super(VppBondInterface, self).__init__(test)
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self.mode = mode
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self.lb = lb
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self.numa_only = numa_only
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self.use_custom_mac = use_custom_mac
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self.mac_address = mac_address
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def add_vpp_config(self):
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r = self.test.vapi.bond_create(self.mode,
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self.lb,
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self.numa_only,
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self.use_custom_mac,
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self.mac_address)
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self.set_sw_if_index(r.sw_if_index)
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def remove_vpp_config(self):
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self.test.vapi.bond_delete(self.sw_if_index)
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def enslave_vpp_bond_interface(self,
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sw_if_index,
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is_passive=0,
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is_long_timeout=0):
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self.test.vapi.bond_enslave(sw_if_index,
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self.sw_if_index,
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is_passive,
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is_long_timeout)
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def detach_vpp_bond_interface(self,
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sw_if_index):
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self.test.vapi.bond_detach_slave(sw_if_index)
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def is_interface_config_in_dump(self, dump):
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for i in dump:
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if i.sw_if_index == self.sw_if_index:
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return True
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else:
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return False
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