IOS-XR configure VRF on Physical- and Subinterfaces#377
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IOS-XR configure VRF on Physical- and Subinterfaces#377sven-rosenzweig wants to merge 2 commits into
sven-rosenzweig wants to merge 2 commits into
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Due to IOS-XR MTU inheritance behavior for subinterfaces and bundle members, the following rules are sufficient for our use case: - Physical interface: Configure L2 MTU and, if an IP address is present, configure L3 MTU. - Bundle interface: Configure only the L2 MTU. - Bundle member interface (physical): Do not configure MTU settings directly. L2 MTU is inherited from the bundle interface, and L3 MTU is configured on the corresponding subinterface. - Subinterface (physical or bundle): Configure only the L3 MTU, using a default value of 1500 bytes. In this commit, we assume a default L3 MTU of 1500 bytes. Cisco IOS-XR automatically adds: - 4 bytes for 802.1Q encapsulation - 8 bytes for 802.1ad (Q-in-Q) encapsulation This allows subinterfaces to operate correctly with the default L3 MTU. Official Cisco documentation: https://www.cisco.com/c/de_de/support/docs/ios-nx-os-software/ios-xr-software/116350-trouble-ios-xr-mtu-00.html Signed-off-by: Sven Rosenzweig <sven.rosenzweig@sap.com>
Signed-off-by: Sven Rosenzweig <sven.rosenzweig@sap.com>
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