I have these two 3745 identical router. RouterA has existing config while RouterB has no config. Both has 12.3(21) Enterprise Plus IOS, I upgrade them to 12.4(10b) Advanced Enterprise. When I execute "show run" in RouterA, the BGP configuration part shows the same when it has the old IOS after reboot. However, when I paste the config to RouterB, the BGP configuration part shows different. Why is it so?
RouterA BGP config after upgrading from 12.3(21) Enterprise Plus IOS to 12.4(10b) Advanced Enterprise and reboot.
RouterB shows the new MBGP cli format. I'm not sure why it upgraded the configuration by default. You usually need to enter the "bgp upgrade-cli" command under "router bgp" for the upgrade to take place.
Can you provide a "show ver" from both routers.
Hope this helps,
Harold Ritter Sr. Technical Leader CCIE 4168 (R&S, SP) firstname.lastname@example.org México móvil: +52 1 55 8312 4915 Cisco México Paseo de la Reforma 222 Piso 19 Cuauhtémoc, Juárez Ciudad de México, 06600 México
Thank you for your reply. Similar symptoms happen when I paste RouterA config to 3845 router with 12.4(10b) Adv Ent IOS. Here is the "sh ver" output from RouterA and RouterB. BTW, I don't see "bgp upgrade-cli" command option under "router bgp".
Cisco IOS Software, 3700 Software (C3745-ADVENTERPRISEK9-M), Version 12.4(10b),
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