[c-nsp] Res: ISSU on SXF - SXI

Hi I have good experiences with ISSU to upgrade IOS to SRB4 to SRD1 or SRD3. I have made the procedure a few times without problems. The messages about missing ifindex values, IDB failures and other is normal while the procedure. I just found a BUG ID when I some problems while upgrade from

[c-nsp] Res: BGP Hold time expired/ospf dropping 6500 Sup720-3BXL

Hi, My experience with this kind of problem of Dead timer expired on OSPF solve with: - Put in the interface and subinterface all the same MTU. - Configure on the OSPF - ip ospf ignore-mtu - We use the topology 7600 - SWITCH-7600, that almost 100% of the times when this problem happed have